# BUS 308 Ashford Week 3 Quiz

**This document of BUS 308 Week 3 Quiz includes answers to the next questions:**

1. Question : There is little difference between the values of ta/2 and Za/2 when the sample

size is small.

size is large.

mean is small.

mean is large.

standard deviation is small.

2. Question : If the population proportion is .4 with a sample size of 20, then is this sample large enough so that the sampling distribution of is a normal distribution.

True

False

3. Question : For non-normal populations, as the sample size (n) _________, the distribution of sample means approaches a/an __________ distribution.

decreases, uniform

increases, normal

decreases, normal

increases, uniform

increases, exponential

4. Question : As the sample size ________the variation of the sampling distribution of ___________.

decreases, decreases

increases, remains the same

decreases, remains the same

increases, decreases

5. Question : Assuming the same value of a, as the sample size increases, the value of ta/2 approaches the value of Za/2.

True

False

6. Question : If the sampled population has mean 48 and standard deviation 16, then the mean and the standard deviation for the sampling distribution of for n = 16 are

4 and 1.

12 and 4.

48 and 4.

48 and 1.

48 and 16.

True

False

8. Question : As our sample standard deviation increases when all other parts of the confidence interval stay the same, then the confidence interval will become:

wider

narrower

remain the same.

9. Question : When the sample size and sample standard deviation remain the same, a 99% confidence interval for a population mean,