# Question

For each level of precision, find the required sample size to estimate the mean starting salary for a new CPA with 95 percent confidence, assuming a population standard deviation of $7,500 (same as last year).

a. E = $2,000

b. E = $1,000

c. E = $500

a. E = $2,000

b. E = $1,000

c. E = $500

## Answer to relevant Questions

Last year, a study showed that the average ATM cash withdrawal took 65 seconds with a standard deviation of 10 seconds. The study is to be repeated this year. How large a sample would be needed to estimate this year's mean ...The city fuel economy of a 2009 Toyota 4Runner 2WD 6 cylinder 4 L automatic 5-speed using regular gas is a normally distributed random variable with a range 16 MPG to 21 MPG. (a) Estimate the standard deviation using Method ...Inspection of a random sample of 19 aircraft showed that 15 needed repairs to x a wiring problem that might compromise safety. How large a sample would be needed to estimate the true proportion of jets with the wiring ...A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were (a) Construct a 90 percent confidence interval for the true mean weight. (b) What ...Dave the jogger runs the same route every day (about 2.2 miles). On 18 consecutive days, he recorded the number of steps using a pedometer. The results were (a) Construct a 95 percent confidence interval for the true mean ...Post your question

0