Questions from Business Statistics

Q: Wildlife biologists inspect 153 deer taken by hunters and find 32 of

Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease. 1. Create a 90% confidence interval for the percentage of deer that may ca...

Q: Suppose ACT, Inc. wants to update their information from Exercise

Suppose ACT, Inc. wants to update their information from Exercise 46 on the percentage of freshmen that return for a second year of college. 1. They want to cut the stated margin of error in half. How...

Q: A newspaper reports that the governor approval rating stands at 65%.

A newspaper reports that the governor approval rating stands at 65%. The article adds that the poll is based on a random sample of 972 adults and has a margin of error of 2.5%. What level of confidenc...

Q: A TV news reporter says that a proposed constitutional amendment is likely

A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 1505 likely voters indicated that 52% would vote in favor. The rep...

Q: A medical researcher measured the pulse rates (beats per minute)

A medical researcher measured the pulse rates (beats per minute) of a sample of randomly selected adults and found the following Student t-based confidence interval: With 95.00% Confidence,70.887604

Q: Cornell University has used a lake source cooling plant that circulates water

Cornell University has used a lake source cooling plant that circulates water from Cayuga Lake through a heat transfer system to chill water for use on campus in refrigeration and air conditioning. Su...

Q: The histogram shows the neck sizes (in inches) of the

The histogram shows the neck sizes (in inches) of the 250 men recruited for the health study in Utah from Exercise 9. (Data in Bodyfat. The neck sizes in Bodyfat are in cm. Divide by 2.54 for inches.)...

Q: Data collected by child development scientists produced this confidence interval for the

Data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl: t-Interval for μ(95.00% Confidence)30.65

Q: A sample of 20 CEOs from the Forbes 500 shows total annual

A sample of 20 CEOs from the Forbes 500 shows total annual compensations ranging from a minimum of $0.1 to $62.24 million. The average for these 20 CEOs is $7.946 million. Here a histogram: Based on t...

Q: A credit card company takes a random sample of 100 cardholders to

A credit card company takes a random sample of 100 cardholders to see how much they charged on their card last month. Here a histogram. A computer program found that the resulting 95% confidence inter...