Questions from Business Statistics

Q: To select the site for an electricity-generating wind turbine,

To select the site for an electricity-generating wind turbine, wind speeds were recorded at several potential sites every 6 hours for a year. Two sites not far from each other looked good. Each had a...

Q: In Exercise 17, we saw summary statistics for 10 drivers car

In Exercise 17, we saw summary statistics for 10 drivers car insurance premiums quoted by a local agent and an online company. Here are displays for each company quotes and for the difference (Local O...

Q: In Exercise 18, we saw summary statistics for wind speeds at

In Exercise 18, we saw summary statistics for wind speeds at two sites near each other, both being considered as locations for an electricity-generating wind turbine. The data, recorded every 6 hours...

Q: Exercises 17 and 19 give summaries and displays for car insurance premiums

Exercises 17 and 19 give summaries and displays for car insurance premiums quoted by a local agent and an online company. Test an appropriate hypothesis to see if there is evidence that drivers might...

Q: Exercises 18 and 20 give summaries and displays for two potential sites

Exercises 18 and 20 give summaries and displays for two potential sites for a wind turbine. Test an appropriate hypothesis to see if there is evidence that either of these sites has a higher average w...

Q: The following table gives the average daily high temperatures in January and

The following table gives the average daily high temperatures in January and July for several cities. Find a 95% confidence interval for the mean temperature difference between summer and winter. 1. a...

Q: The table below shows the winning times (in minutes) for

The table below shows the winning times (in minutes) for men and women in the New York City Marathon between 1978 and 2016. (www.nycmarathon.org) (The race was not run in 2012 because of Superstorm Sa...

Q: A different regression from the one in Exercise 7 , now using

A different regression from the one in Exercise 7 , now using all of the available data (years 1959 to 2016), looks like this: Response variable is: Avg Global temp R squared =90.0% R squared (adjust...

Q: After receiving many complaints about his final-grade histogram from students

After receiving many complaints about his final-grade histogram from students currently taking a statistics course, the professor from Exercise 79 distributed the following revised histogram: 1. Comme...

Q: Every year, the students at Gossett High School take a physical

Every year, the students at Gossett High School take a physical fitness test during their gym classes. One component of the test asks them to do as many push-ups as they can. Results for one class are...