Question 1

How can survey questions lead to non-sampling errors?

Question 2

How does the population mean affect the power of the hypothesis test?

Question 3

The Department of Labor would like to estimate the average weekly wages for US adults with a margin of error equal to $20. Determine the sample size needed to construct a confidence interval for this estimate using a confidence level of 90%. Assume the population standard deviation for the weekly wage is $160.

Question 4

Which type of error is known as a consumer’s risk?

Question 5

Explain the difference between convenience, non-probability, probability, stratified, clustered, and systematic samples.

Write a multi-paragraph response.

Question 6

When the standard deviation is known and the sample size is less than 30, what characteristic must the population have to calculate a confidence interval?

Question 7

How can cluster sampling be considered like a convenience sampling?

Question 8

How is the p-value related to the critical value?

Select one:

a.) Both the p-value and critical value can be used to find the correct hypothesis statements to test.

b.) Both the p-value and critical value can be used to determine the conclusion of a hypothesis test.

c.) Both the p-value and critical value can be used to verify the correct confidence levels for the test.

d.) Both the p-value and critical value can be used to verify the correct significance levels for the test.

Question 9

According to a 2010 BusinessWeek article, the average 401(k) account balance for individuals nearing retirement was $60,000. To test if this average has recently changed, suppose a sample of 30 people starting retirement was selected and it was found that the average 401(k) balance was $67,900. Assume the population standard deviation is $21,000. State the null and alternative hypothesis.

Question 10

What does the confidence interval tells us about a sample’s mean?

Question 11

Generation Y has been defined as those individuals who were born between 1981 and 1991. According to the Project on Study Debt, Generation Y students graduating from college averaged $23,200 in debt in 2009. Assume the standard deviation for debt is $7500 per student. What is the probability that the sample mean will be less than $24,000 for a sample size of