1. Samples of size n = 15 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the standard deviation is found for each sample. What is the distribution of the sample standard deviations?

skewed to the left
not enough information provided
skewed to the right
normal (approximately)

2. Use the given data to find the minimum sample size required to estimate the population proportion.
Margin of error: 0.09; confidence level: 90%; from a prior study, is estimated by 0.23.

5
180
53
60

Question

1. Samples of size n = 15 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the standard deviation is found for each sample. What is the distribution of the sample standard deviations?
 	
skewed to the left
not enough information provided
skewed to the right
normal (approximately)

2. Use the given data to find the minimum sample size required to estimate the population proportion.
Margin of error: 0.09; confidence level: 90%; from a prior study,  is estimated by 0.23.
 	
5
180
53
60