Questions from Business Statistics

Q: A soft-drink manufacturer must be sure the bottle caps on

A soft-drink manufacturer must be sure the bottle caps on the soda are fully sealed and will not come off easily. Inspectors pull a few bottles off the production line at regular intervals and test th...

Q: Older Americans with a college education are significantly more likely to be

Older Americans with a college education are significantly more likely to be emotionally well-off than are people in this age group with less education. Among those aged 65 and older, 35% scored 90 or...

Q: Does the use of computer software in introductory statistics classes lead to

Does the use of computer software in introductory statistics classes lead to better understanding of the concepts? A professor teaching two sections of statistics decides to investigate. She teaches b...

Q: The data file Commuter sample holds a sample drawn from the Population

The data file Commuter sample holds a sample drawn from the Population commute times data set. Using your statistics program make histograms of the sample and the population. Discuss how they are simi...

Q: The journal Circulation reported that among 1900 people who had heart attacks

The journal Circulation reported that among 1900 people who had heart attacks, those who drank an average of 19 cups of tea a week were 44% more likely than nondrinkers to survive at least 3 years aft...

Q: Here are the same data you saw in Exercise 45 after re

Here are the same data you saw in Exercise 45 after re-expressions as the square root of assets (in $M) and the logarithm of assets (in $M): 1. Which re-expression do you prefer? Why? 2. In the square...

Q: Use the statistics package of your choice or the simple sample tool

Use the statistics package of your choice or the simple sample tool at astools.datadesk.com to draw samples of the conditions from the New York bridges 2016 data file. Draw a sample of 50, a sample of...

Q: A paper published in 2017 in JAMA Internal Medicine (jamanetwork

A paper published in 2017 in JAMA Internal Medicine (jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528) reported on a study of alternate-day fasting as a weight-loss method. One hundre...

Q: Researchers at the Washington University School of Medicine randomly placed 480 rats

Researchers at the Washington University School of Medicine randomly placed 480 rats into one of three chambers containing radio antennas. One group was exposed to digital cell phone radio waves, the...

Q: In restaurants, servers rely on tips as a major source of

In restaurants, servers rely on tips as a major source of income. Does serving candy after the meal produce larger tips? To find out, two waiters determined randomly whether or not to give candy to 92...