Questions from Applied Statistics


Q: A sample of 213 newspaper tire ads from several Sunday papers showed

A sample of 213 newspaper tire ads from several Sunday papers showed that 98 contained a low-price guarantee (offer to “meet or beat any price”). (a) Assuming that this was a random sample, construct...

See Answer

Q: A physician’s billing office conducted a random check of patient records and

A physician’s billing office conducted a random check of patient records and found that 36 of 50 patients had changed insurance plans within the past year. Construct a 90 percent confidence interval f...

See Answer

Q: Of 250 college students taking a statistics class, 4 reported an

Of 250 college students taking a statistics class, 4 reported an allergy to peanuts. (a) Is the criterion for normality of p met? (b) Assuming that this was a random sample, use MINITAB to construct a...

See Answer

Q: (a) A poll of 2,277 likely voters was

(a) A poll of 2,277 likely voters was conducted on the president’s performance. Approximately what margin of error would the approval rating estimate have? (b) The poll showed that 44 percent approved...

See Answer

Q: To determine the proportion of taxpayers who prefer filing tax returns electronically

To determine the proportion of taxpayers who prefer filing tax returns electronically, a survey of 600 taxpayers was conducted. Calculate the margin of error used to estimate this proportion. What ass...

See Answer

Q: A sample of 40 CDs from a student’s collection showed a mean

A sample of 40 CDs from a student’s collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95 percent confidence interval for the population standard...

See Answer

Q: A random sample of 30 lunch orders at Noodles and Company showed

A random sample of 30 lunch orders at Noodles and Company showed a mean bill of $10.36 with a standard deviation of $5.31. Find the 95 percent confidence interval for the mean bill of all lunch orders...

See Answer

Q: The probability that a 30-year-old white male will

The probability that a 30-year-old white male will live another year is .99863. What premium would an insurance company charge to break even on a one-year $1 million term life insurance policy?

See Answer

Q: As a birthday gift, you are mailing a new personal digital

As a birthday gift, you are mailing a new personal digital assistant (PDA) to your cousin in Toledo. The PDA cost $250. There is a 2 percent chance it will be lost or damaged in the mail. Is it worth...

See Answer

Q: Discuss why you would or would not expect each of the following

Discuss why you would or would not expect each of the following variables to be normally distributed. Hint: Would you expect a single central mode and tapering tails? Would the distribution be roughly...

See Answer