Question A

A simple random sample of 200 observations was taken from a population. The sample mean was determined to be 40, and the population standard deviation was determined to be 18. The standard error of the mean is:

Question 13 options:

2.28

1.27

2.81

2.84

Question B

The amount of salt in a bag of potato chips is normally distributed with a mean of 1.2 g. You sample 64 bags and the mean is 1.4 g. If the probability that the mean amount of salt for a sample of 64 bags would be this extreme is 0.0548, what is the standard deviation of the parent distribution?

Question 14 options:

0.125 g

1.125 g

1.0 g

0.015625 g

Question 15(1 point)

The mean of the all sample means is equal to:

Question 15 options:

the mean of the sample

the mean of the original population

population standard deviation

the distribution of the sample