Questions from Business Statistics

Q: Here is a stem-and-leaf display showing profits (

Here is a stem-and-leaf display showing profits (in $M) for 30 of the 500 largest global corporations (as measured by revenue). The stems are split; each stem represents a span of 5000 ($M), from a pr...

Q: Consumer groups are concerned that cereals with a high sugar content (

Consumer groups are concerned that cereals with a high sugar content (usually designed for children) are placed just where kids are most likely to see them in the middle shelf of the supermarket. The...

Q: Is the mean amount of salt higher in menu items that contain

Is the mean amount of salt higher in menu items that contain meat? 1. Compare the sodium content of the meat and non-meat items with displays and summary statistics. 2. By shuffling the variable Meat...

Q: The Hopkins Forest dataset includes all 24 weather variables reported by the

The Hopkins Forest dataset includes all 24 weather variables reported by the researchers. Many of the variables (e.g., temperature, relative humidity, solar radiation, wind) are reported as daily aver...

Q: The Titanic dataset includes more variables than just those discussed in Chapter

The Titanic dataset includes more variables than just those discussed in Chapter 2. Others include such variables as the crew job and where each person boarded the ship. Stories, biographies, and pict...

Q: The Student survey dataset introduced in the Chapter 3 exercises includes responses

The Student survey dataset introduced in the Chapter 3 exercises includes responses to 13 questions. Investigate the associations among the variables that you find interesting. Write a short report on...

Q: The dataset Movies 06-15 introduced in the Chapter 3 exercises

The dataset Movies 06-15 introduced in the Chapter 3 exercises includes the distributor, number of tickets sold, and gross revenue in addition to the MPAA rating and the genre for each of the 10 years...

Q: Most water tanks have a drain plug so that the tank may

Most water tanks have a drain plug so that the tank may be emptied when it to be moved or repaired. How long it takes a certain size of tank to drain depends on the size of the plug, as shown in the t...

Q: A start-up company has developed an improved electronic chip for

A start-up company has developed an improved electronic chip for use in laboratory equipment. The company needs to project the manufacturing cost, so it develops a spreadsheet model that takes into ac...

Q: Engineers at a computer production plant tested two methods for accuracy in

Engineers at a computer production plant tested two methods for accuracy in drilling holes into a PC board. They tested how fast they could set the drilling machine by running 10 boards at each of two...