a. The mean is 108.6, the standard deviation is 2.81 and the shape of the distri

Question

a. The mean is 108.6, the standard deviation is 2.81 and the shape of the distribution is slightly skewed right.

b. We can not answer this question without more information.    

c. The mean is 107, the standard deviation is 2.81 and the shape of the distribution is normal.

d. The mean is 107, the standard deviation is 18 and the shape of the distribution is slightly skewed right with outliers on the right.

e.The mean is 107, the standard deviation is 18 and the shape of the distribution is normal.

f.The mean is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly skewed right.

(b) For the distribution of the data, which of the following is correct?

a.The mean is 108.6, the standard deviation is 2.81 and the shape of the distribution is slightly skewed right.

b.The mean is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly skewed right.    

c.The mean is 107, the standard deviation is 18 and the shape of the distribution is normal.

d.We cant answer this question without more information.

e.The mean is 107, the standard deviation is 2.81 and the shape of the distribution is normal.

(c) For samples of size 41, consider the sampling distribution of distribution X. Which of the following is correct?

a.The mean of the sampling distribution of X is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly right skewed with possibly some outliers on the right.

b.The mean of the sampling distribution of X is 107, the standard deviation is 2.81 and the shape of the distribution is approximately normal.    

c.The mean of the sampling distribution of X is 107, the standard deviation is 18 and the shape of the distribution is approximately normal.

d.The mean of the sampling distribution of X is 108.6, the standard deviation is 2.59 and the shape of the distribution is approximately normal.

(d) Suppose another sample of 41 students is to be randomly selected from this population. Find the probability that the mean of this sample is greater than 110.

Please give your answer to 4 decimal places.

Plot of all population values Fastest 110 110 110 110 110 110 115 120 120 120 120 125 125 125 125 127 130 135 145 150 85 85 85 90 90 95 95 95 95 95 70 90 110 130 150 170 190 Plot of data shown right 100 102 104 105 105 105 105 110 70 90 110 130 150 170 190

Explanation / Answer

a. The mean is 108.6, the standard deviation is 2.81 and the shape of the distribution is slightly skewed right.

b. We can not answer this question without more information.    

c. The mean is 107, the standard deviation is 2.81 and the shape of the distribution is normal.

d. The mean is 107, the standard deviation is 18 and the shape of the distribution is slightly skewed right with outliers on the right.

e.The mean is 107, the standard deviation is 18 and the shape of the distribution is normal.

f.The mean is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly skewed right.

(b) For the distribution of the data, which of the following is correct?

a.The mean is 108.6, the standard deviation is 2.81 and the shape of the distribution is slightly skewed right.

b.The mean is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly skewed right.    

c.The mean is 107, the standard deviation is 18 and the shape of the distribution is normal.

d.We cant answer this question without more information.

e.The mean is 107, the standard deviation is 2.81 and the shape of the distribution is normal.

(c) For samples of size 41, consider the sampling distribution of distribution X. Which of the following is correct?

a.The mean of the sampling distribution of X is 108.6, the standard deviation is 16.6 and the shape of the distribution is slightly right skewed with possibly some outliers on the right.

b.The mean of the sampling distribution of X is 107, the standard deviation is 2.81 and the shape of the distribution is approximately normal.    

c.The mean of the sampling distribution of X is 107, the standard deviation is 18 and the shape of the distribution is approximately normal.

d.The mean of the sampling distribution of X is 108.6, the standard deviation is 2.59 and the shape of the distribution is approximately normal.

(d) Suppose another sample of 41 students is to be randomly selected from this population. Find the probability that the mean of this sample is greater than 110.

Please give your answer to 4 decimal places.

Plot of all population values Fastest 110 110 110 110 110 110 115 120 120 120 120 125 125 125 125 127 130 135 145 150 85 85 85 90 90 95 95 95 95 95 70 90 110 130 150 170 190 Plot of data shown right 100 102 104 105 105 105 105 110 70 90 110 130 150 170 190

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