Questions from Business Statistics

Q: View the 20,000 people in the donations database on the

View the 20,000 people in the donations database on the companion site as a random sample from a much larger group of potential donors. Determine whether or not the amount donated in response to the c...

Q: Suppose that the target response rate was 4% when the current

Suppose that the target response rate was 4% when the current mailing was sent to the 20,000 people in the donations database on the companion site. a. Find the actual response rate represented by the...

Q: If the list price of the Eureka 4750A Bagged Upright Vacuum cleaner

If the list price of the Eureka 4750A Bagged Upright Vacuum cleaner is $79.99, is the average price, based on the data from Table 9.6.1, significantly different from a 10% discount? Table 9.6.1:

Q: At a recent meeting, it was decided to go ahead with

At a recent meeting, it was decided to go ahead with the introduction of a new product if “interested consumers would be willing, on average, to pay $20.00 for the product.” A study was conducted, wit...

Q: a. Why might a one-sided test be appropriate for

a. Why might a one-sided test be appropriate for the preceding problem? b. Identify the null and research hypotheses for a one sided test, using both words and mathematical symbols. c. Perform a one-s...

Q: As part of a decision regarding a new product launch, you

As part of a decision regarding a new product launch, you want to test whether or not a large enough percentage (10 % or more) of the community would be interested in purchasing it. You will launch th...

Q: a. Perform a two-sided test at the 1%

a. Perform a two-sided test at the 1% significance level for the previous problem and describe the result. b. State the p-value as either p>0.05, p

Q: Do you agree that the follow-up mailings were a good

Do you agree that the follow-up mailings were a good idea?

Q: You are considering a new delivery system and wish to test whether

You are considering a new delivery system and wish to test whether delivery times are significantly different, on average, than your current system. It is well established that the mean delivery time...

Q: You work for a company that prepares and distributes frozen foods.

You work for a company that prepares and distributes frozen foods. The package claims a net weight of 14.5 ounces. A random sample of today’s production was weighed, producing the following data set:...