can you please help me? (if u answer this and it does not solve this at all just to get the points u will be reported) (20 points)!

Answer:

answers rounded to the nearest tens: 1730, 480, 4832720, and 130.

While a common rule of thumb is to have a minimum sample size of 100 for continuous data to be statistically significant, the actual appropriate sample size may vary depending on the specific study design and research question. Option(D)

In statistics, the term "statistical significance" refers to whether an observed effect or relationship in the data is likely to be real and not just due to random chance. To determine statistical significance, we often perform hypothesis testing.

The sample size is a crucial factor in hypothesis testing. A larger sample size generally provides more reliable and precise estimates of population parameters and increases the statistical power of the test. With a larger sample size, even smaller effects or differences between groups can become statistically significant.

While there is no hard and fast rule for the minimum sample size to achieve statistical significance, a common guideline is to aim for at least 30 samples. This guideline is often used in the context of the Central Limit Theorem, which states that the sampling distribution of the sample mean becomes approximately normally distributed with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.

In practice, the appropriate sample size depends on various factors, including the nature of the data, the effect size being studied, the desired level of confidence, and the statistical test used. Researchers often conduct sample size calculations based on these factors before conducting their studies to ensure they have an adequate sample size to achieve meaningful results and detect significant effects if they exist.

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Answer:

The third set of ordered pairs

Step-by-step explanation:

one x is paired with one y

Answer:

3.22

Step-by-step explanation:

log(18×100)

log18+log100

1.22+2

3.22

The magnitude of this earthquake using the Richter scale is approximately 3.3 (rounded to the nearest tenth).

To calculate the magnitude of the earthquake using the Richter scale, we can use the formula

R = log(A/A₀),

where

A is the amplitude of the earthquake wave, and

A₀ is the amplitude of the standard wave.

If the earthquake wave's amplitude is 1800 times as great as the smallest detectable wave, this means A/A₀ = 1800.

Therefore, the magnitude of the earthquake (R) would be:

R = log(1800)

Let's calculate it:

R ≈ log₁₀(1800) ≈ 3.255

So, if we round this to the nearest tenth, the earthquake's magnitude on the Richter scale would be approximately 3.3.

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I'm not sure if this dividing,multiplying,subtracting or adding but for adding i got 6 as my answer.I don't know if this the correct answer but its better than having no answer right?

Answer:

It depends... look at the bottom of my explanation

Step-by-step explanation:

\(5\frac{1}{3}=\frac{31}{3}\)   — I converted this to an improper fraction to make this easier; the 30 added to the 1 in the numerator comes from multiplying 5 by the denominator, 3, to create an equivalent number.

³¹/₃ ÷ ²/₃  — Now we divide the two fractions.

³¹/₃ × ³/₂  — Dividing by one fraction is the same as multiplying by its reciprocal

³¹/₁ × ¹/₂  — One fraction has a 3 in its numerator, the other in its denominator. These two "3" values cancel out

31 ÷ 2  — simplifying the resulting expression

³¹/₂ = 15.5  — two other ways to rewrite it; 15.5 comes from dividing 31 by 2

Now, she can't make part of a batch... could she? If she can, it's 15.5. If she can't, she can make 16 or 15 batches depending on how you round.

That's a judgment call. But I hope you understand this better! Have a great day!

Answer:

8 is congruent 9 isnt

Step-by-step explanation:

Answer: 8. is Congruent and 9. Isn't Congruent

Step-by-step explanation:

The elementary matrix E that transforms A into B is:
E = [1 0 0]
   [0 1 -2]
   [0 0 1]

Regarding the first question, the following statements are true:
Now, for the second question, to find an elementary matrix E such that EA = B, we need to perform elementary row operations on A.  

Let's calculate the row operations required to transform A into B:

Multiply the second row of A by 2 and add it to the first row.
  New A: [1 0 1]
         [0 1 -2]
         [0 0 1]

2. Multiply the third row of A by -1 and add it to the first row.
  New A: [1 0 0]
         [0 1 -2]
         [0 0 1]
Therefore, the elementary matrix E that transforms A into B is:
E = [1 0 0]
   [0 1 -2]
   [0 0 1]

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(a) The inverse of matrix A, denoted as A^(-1), can be computed by finding the transpose of A and then dividing it by the determinant of A. The inverse matrix A^(-1) is obtained by taking the transpose of A and dividing it by the determinant of A.

(b) The transformation of vector v under the inverse transformation A^(-1) is given by A^(-1)v. It effectively rotates the vector counterclockwise by 45 degrees, reversing the effect of the original transformation A.

(a) To compute A^(-1), find the transpose of matrix A by interchanging its rows and columns. If A = [a11, a12; a21, a22], then the transpose of A is [a11, a21; a12, a22]. Next, calculate the determinant of matrix A, given by det(A) = a11 * a22 - a12 * a21. Finally, divide the transpose of A by the determinant of A to obtain A^(-1).

(b) The transformation of vector v under the inverse transformation A^(-1) is represented by A^(-1)v. This operation rotates the vector counterclockwise by 45 degrees, effectively reversing the effect of the original transformation A. It can be computed by multiplying the inverse matrix A^(-1) with the vector v.

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As we know that,

\(\bigstar \: \boxed{\sf {Area_{(Trapezium)} = \dfrac{1}{2} \times ( a + b) \times h}} \\ \)

Substituting values, we get :

\( \longmapsto \) Area = \(\sf \dfrac{1}{2} \) × ( 60 + 40 ) × 30 ft\( \sf ^2 \)

\( \longmapsto \) Area = \(\sf \dfrac{1}{2} \) × 100 × 30 ft\( \sf ^2 \)

\( \longmapsto \) Area = 1 × 100 × 15 ft\( \sf ^2 \)

\( \longmapsto \) Area = 100 × 15 ft\( \sf ^2 \)

\( \longmapsto \) Area = 1500 ft\( \sf ^2 \)

Therefore,

The statement "Relationships between two categorical variables are less evident when the data is expressed in counts rather than percentages" is false. Categorical variables are those that divide a population into groups. These groups can be classified into one of two categories: nominal or ordinal. The nominal category does not have an intrinsic order, whereas the ordinal category does.

Categorical data is a data type that is collected from observations that are grouped into categories with numerical figures. These variables are frequently defined in nominal terms. The data is expressed in percentages or proportions in a categorical data table instead of counts. When analyzing categorical data, it is best to use percentages, as these provide a better picture of the underlying relationship.

Therefore, relationships between two categorical variables are more evident when data is expressed in percentages rather than counts. When percentages are utilized, it is more straightforward to understand the relationship between two categorical variables. An example of categorical data is the top 150 movies of all time.

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The possible number of solutions to the equations in the system is 2. A solution is a collection of data designated to the unexplored variables.

A solution is a set of values assigned to the unknown variables that ensure the equation's equality.

To put it another way, a solution is a value or a set of values (one for each unknown) that, when substituted for the unknowns, makes the equation equal.

The given system of equation is;

\(x^2+y^2=9\)

The standard equation of the  circle is;

\((x-h)^2+(y-k)^2=r^2\)

On comparing the given equation with the standard equation;

The first equation shows the center is at origin(0,0). and radius is 3.

The second equation shows the given equation is a straight line.

As we know that a straight line can only intersect a circle at a maximum of 2 points.

Hence the possible number of solutions to the equations in the system is 2.

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Answer:

40

Step-by-step explanation:

Step 1:

Start by setting it up with the divisor 6 on the left side and the dividend 240 on the right side.

Step 2:

The divisor (6) goes into the first digit of the dividend (2), 0 time(s). Therefore, put 0 on top.

Step 3:

Multiply the divisor by the result in the previous step (6 x 0 = 0) and write that answer below the dividend.

Step 4:

Subtract the result in the previous step from the first digit of the dividend (2 - 0 = 2) and write the answer below.

Step 5:

Move down the 2nd digit of the dividend (4).

Step 6:

The divisor (6) goes into the bottom number (24), 4 time(s). Therefore, put 4 on top.

Step 7:

Multiply the divisor by the result in the previous step (6 x 4 = 24) and write that answer at the bottom.

Step 8:

Subtract the result in the previous step from the number written above it. (24 - 24 = 0) and write the answer at the bottom.

Step 9:

Move down the last digit of the dividend (0).

Step 10:

The divisor (6) goes into the bottom number (0), 0 time(s). Therefore put 0 on top.

Step 11:

Multiply the divisor by the result in the previous step (6 x 0 = 0) and write the answer at the bottom.

Step 12:

Subtract the result in the previous step from the number written above it. (0 - 0 = 0) and write the answer at the bottom.

Hope this helps!

0.688 will be the probability of getting a nickel from the jar.

Given,

Probability;-

Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.

Here,

The number of fortunate situations divided by the total number of coins would be the product between the probability of each occurrence and the likelihood of each event.

Therefore,

P(nickel) = 19/69

P(penny) = 17/68

That is,

P = 19/69 × 17/68

P = 323/4692

P = 0.0688

That is,

The probability of getting nickel from the jar is 0.06888

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The line which have a steeper slope is Line 1.

It is given in the question that the points on the line are given by:-

Line 1: (0,-4) and (2,2)

Line 2:(0,-4) and (4,5)

We have to find which line has a steeper slope.

First we will find the slope of each line.

We know that slope of a line with points (a,b) and (c,d) is given by:-

(d-b)/(c-a)

Slope of Line 1:

(2-(-4))/(2-0) = 6/2 = 3

Slope of Line 2:

(5-(-4))/(4-0) = 9/4 = 9/4 = 2.25

We know that greater the slope of the line means greater the steep of the line.

As,

3 > 2.25

Hence, Line 1 is steeper than Line 2.

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The least number of socks you need to pick is 10 red socks, 10 blue socks, and 10 white socks to ensure you have a matching pair. The least number of socks that can be taken from the drawer is one.

Follow these steps:
1. Pick one sock from the drawer (it could be any color, let's say red).
2. Pick a second sock from the drawer (if it's red, you have a matching pair; if not, let's say it's blue).
3. If you don't have a matching pair yet, pick a third sock from the drawer (now, it's either red, blue, or white, and you'll have a matching pair for sure).
So, the least number of socks you need to pick to ensure a matching pair is 3.

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Answer:

6:50 p.m.

Step-by-step explanation:

150 miles / 60 mph = 2.5 hours

2 hours after 4:20 p.m. is 6:20 p.m.

30 minutes (1/2 hour) after 6:20 p.m. is 6:50 p.m.

Answer: The answer is A

Step-by-step explanation:

i got it right so yeah

Answer:

b

Step-by-step explanation:

If Lucinda used a random selection method, made an effort to ensure that the sample is representative, and the sample size is large enough, then it's possible that the sample is indeed random.

what are perpendicular lines?

Perpendicular lines are two lines that intersect at a 90-degree angle, forming four right angles at the point of intersection. In other words, if you were to draw a perpendicular line from one of the lines to the other at their point of intersection, it would form a right angle with each of the original lines.

Without having access to more information about how Lucinda selected the sample of students, it's difficult to determine whether or not the sample is truly random.

However, there are a few things that we can consider when trying to determine whether or not the sample is random. For example:

Did Lucinda use a random selection method to choose the students? If she simply surveyed her friends or classmates, for example, the sample would not be random.

Did Lucinda make any effort to ensure that the sample is representative of the larger population of students? For example, did she make sure to include students from a variety of grades, genders, and ethnic backgrounds.

Therefore, if Lucinda used a random selection method, and made an effort to ensure that the sample is representative, and the sample size is large enough, then it's possible that the sample is indeed random.

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Answer:

3

384

5

2.8

10

Step-by-step explanation:

--------------------------------------

10 + 14 = 24  |  13 - 5 = 8

24 divided by 8 = 3

--------------------------------------

8 x 3 = 24  |  10 + 6 = 16

24 x 16 = 384

--------------------------------------

9 + 36 = 45  |  45 - 5 = 40

40 divided by 8 = 5

--------------------------------------

8 - 4 = 4  |  4 + 10 = 14

14 divided by 5 = 2.8

--------------------------------------

8 + 27 = 35  |  35 - 5 = 30

30 divided by 3 = 10

--------------------------------------

Answer:

refer to the above attachment

===========================================================

Explanation:

1/2 is the probability of flipping tails because we have one side labeled tails out of 2 sides total.

1/6 is the probability of rolling a 5, because there's one side we want out of 6 total.

The two events (flipping the coin and rolling the die) are independent, allowing us to multiply those previously mentioned fractions:

(1/2)*(1/6) = (1*1)/(2*6) = 1/12

Answer:

15 weeks

The amount of money is  270

Step-by-step explanation:

You: 60 +14x

Sister: 120+10x

Set them equal to each other

60+14x = 120+10x

Subtract 10x from each side

60+4x= 120

Subtract 60 from each side

4x= 60

Divide by 4

4x/4 = 60/4

x = 15

15 weeks

The amount of money is 120+10*15 = 120+150 = 270

Answer:

15 weeks

$270

Steps:

1: 60+14x=120+10x

2: 4x=60

3: x=15 weeks

4: Amount= 60+14*15= $270

Description:

The first step is to get the money u have that is $60 plus it with the saving u have that is $14 answer will equal as 120+10x  as a equation. Now simplify the equation 4x=60. You will get x=15 that will be the weeks. And now get 60+14 times it by 15 answer will equal as $270. So 15 weeks and $270 is the answer.

Please mark brainliest

Hope this helps.

Mean reversion is the tendency of prices or variables to return to their average level. The mean-reverting level, x1, is calculated using statistical methods and indicates potential future decreases or increases.

Mean reversion refers to the tendency of asset prices or economic variables to move back to their average or mean level over time. The mean-reverting level, x1, for a time series can be calculated using statistical methods like moving averages or exponential smoothing. These techniques estimate the average value or trend of the data.



The interpretation of x1 depends on the context. If the current value is above x1, it suggests a potential future decrease, reverting back to x1. Conversely, if the current value is below x1, it indicates a potential future increase, also reverting back to x1. The deviation from x1 provides insights into the strength or speed of the mean reversion process.



Therefore, Mean reversion is the tendency of prices or variables to return to their average level. The mean-reverting level, x1, is calculated using statistical methods and indicates potential future decreases or increases.

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Answer:

WR = 16

Step-by-step explanation:

The centroid M is the point where the 3 medians intersect

The median is a segment that goes from one of the triangle's vertices to the midpoint of the opposite side.

WY is a median of the triangle , then

WY = YR = 8

WR = wy + yr = 8 + 8 = 16

The estimated crop yield from the simulation is 443 (option b).

To estimate the crop yield from the given random numbers, we need to assign a specific meaning to each random number. Let's assume that each random number represents the crop yield for a particular year.

Given random numbers: 37, 23, 92, 01, 69, 50, 72, 12, 46, 81

To find the estimated crop yield, we sum up all the random numbers:

37 + 23 + 92 + 01 + 69 + 50 + 72 + 12 + 46 + 81 = 443

Therefore, the estimated crop yield from the simulation is 443. The correct option is b.

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Answer:

-2,2

Step-by-step explanation:

The confidence interval at the 95% level of confidence for the true population proportion was reported to be (0.750, 0.950). Therefore, option (A) is correct.

The formula for confidence interval for population proportion is given below: p ± zα/2√(p*q/n)where p is the sample proportion, q is the sample proportion subtracted from 1, n is the sample size, zα/2 is the z-value that corresponds to the level of confidence.

The given 95% confidence interval can be represented as: p ± zα/2√(p*q/n)0.85 ± zα/2√(0.85*0.15/60)Where, p = 0.85, q = 1 - 0.85 = 0.15, n = 60The value of zα/2 for the 95% level of confidence is 1.96.As the new 90% confidence interval will be smaller, the value of zα/2 will be smaller than 1.96.

The value of zα/2 for the 90% level of confidence is 1.645.Now, the 90% confidence interval can be calculated as: p ± zα/2√(p*q/n)0.85 ± 1.645√(0.85*0.15/60)On solving this expression, we get the following intervals as the 90% confidence interval:(0.765, 0.935)

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