Questions from Business Statistics

Q: How large a sample should be selected to provide a 95%

How large a sample should be selected to provide a 95% confidence interval with a margin of error of 10? Assume that the population standard deviation is 40. Applications

Q: Consider the hypothesis test H0: p1 - p2 ≤ 0

Consider the hypothesis test H0: p1 - p2 ≤ 0 Ha: p1 - p2 > 0 The following results are for independent samples taken from the two populations. Sample 1 …………………………… Sample 2 n1 = 200 …………………………….. n2...

Q: Consider the following hypothesis test. H0: µ1 - µ2

Consider the following hypothesis test. H0: µ1 - µ2 = 0 Ha: µ1 - µ2 ≠ 0 The following results are for two independent samples taken from the two populations. Sample 1 …………………………………….. Sample 2 n1 = 8...

Q: A Businessweek/Harris poll asked senior executives at large corporations their

A Businessweek/Harris poll asked senior executives at large corporations their opinions about the economic outlook for the future. One question was, “Do you think that there will be an increase in the...

Q: Forbes reports that women trust recommendations from Pinterest more than recommendations from

Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platfor (https://www.forbes.com/sites/marketshare/2012/03/20/why-brand-managers-n...

Q: Researchers with Oceana, a group dedicated to preserving the ocean ecosystem

Researchers with Oceana, a group dedicated to preserving the ocean ecosystem, reported finding that 33% of fish sold in retail outlets, grocery stores, and sushi bars throughout the United States had...

Q: Minnesota had the highest turnout rate of any state for the 2016

Minnesota had the highest turnout rate of any state for the 2016 presidential election (United States Election Project website). Political analysts wonder if turnout in rural Minnesota was higher than...

Q: Oil wells are expensive to drill, and dry wells are a

Oil wells are expensive to drill, and dry wells are a great concern to oil exploration companies. The domestic oil and natural gas producer Aegis Oil, LLC describes on its website how improvements in...

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy

Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported measure of visitor volume and visitor activity (Orlando Sentinel, https://www.orlandosentinel.com/busines...

Q: The Adecco Workplace Insights Survey sampled men and women workers and asked

The Adecco Workplace Insights Survey sampled men and women workers and asked if they expected to get a raise or promotion this year. Suppose the survey sampled 200 men and 200 women. If 104 of the men...