Questions from Business Statistics

Q: Junk mail Direct mail advertisers send solicitations (a.k.

Junk mail Direct mail advertisers send solicitations (a.k.a. junk mail) to thousands of potential customers in the hope that some will buy the company product. The acceptance rate is usually quite low...

Q: Some food retailers propose subjecting food to a low level of radiation

Some food retailers propose subjecting food to a low level of radiation in order to improve safety, but sale of such irradiated food is opposed by many people. Suppose a grocer wants to find out what...

Q: The mayor of a small city has suggested that the state locate

The mayor of a small city has suggested that the state locate a new prison there, arguing that the construction project and resulting jobs will be good for the local economy. A total of 183 residents...

Q: In the survey on the death penalty you read about in the

In the survey on the death penalty you read about in the Step-by-Step Example, the Gallup Poll actually split the sample at random, asking 510 respondents the question quoted earlier, Generally speaki...

Q: The histogram shows the distribution of the prices of plain pizza slices

The histogram shows the distribution of the prices of plain pizza slices (in $) for 156 weeks in Dallas, TX. Which summary statistics would you choose to summarize the center and spread in these data?...

Q: A city ballot includes a local initiative that would legalize gambling.

A city ballot includes a local initiative that would legalize gambling. The issue is hotly contested, and two groups decide to conduct polls to predict the outcome. The local newspaper finds that 53%...

Q: Vitamin D, whether ingested as a dietary supplement or produced naturally

Vitamin D, whether ingested as a dietary supplement or produced naturally when sunlight falls on the skin, is essential for strong, healthy bones. The bone disease rickets was largely eliminated in En...

Q: A 2011 Gallup Poll found that 76% of Americans believe that

A 2011 Gallup Poll found that 76% of Americans believe that high achieving high school students should be recruited to become teachers. This poll was based on a random sample of 1002 Americans. 1. Fin...

Q: In January 2014 AP-GfK polled 1060 U.S.

In January 2014 AP-GfK polled 1060 U.S. adults to find if people were more concerned with privacy or security. Privacy concerns outweighed concerns about being safe from terrorists for 646 out of the...

Q: Inc. reported that 74% of 1644 randomly selected college freshmen

Inc. reported that 74% of 1644 randomly selected college freshmen returned to college the next year. The study was stratified by type of college public or private. The retention rates were 71.9% among...