# Question: Vail Resorts would like to send a survey to their

Vail Resorts would like to send a survey to their guests asking about their satisfaction with the new 2009 website design. They would like to have a margin of error of 65 percent on responses with 95 percent confidence.

(a) Using the conservative approach, what sample size is needed to ensure this level of confidence and margin of error?

(b) If Vail Resorts wanted the margin of error to be only 62.5 percent, what would happen to the required sample size?

(a) Using the conservative approach, what sample size is needed to ensure this level of confidence and margin of error?

(b) If Vail Resorts wanted the margin of error to be only 62.5 percent, what would happen to the required sample size?

## Answer to relevant Questions

If you repeated a hypothesis test 1,000 times (in other words, 1,000 different samples from the same population), how many times would you expect to commit a Type I error, assuming the null hypothesis were true, if (a) α = ...A certain brand of at white interior latex paint claims one-coat coverage of 400 square feet per gallon. The standard deviation is known to be 20. A sample of 16 gallons is tested. (a) At α = .05 in a left-tailed test, find ...Use Excel to find the critical value of z for each hypothesis test. a. α = .05, two-tailed test b. α = .10, right-tailed test c. α = .01, left-tailed test The mean arrival rate of fights at O'Hare Airport in marginal weather is 195 fights per hour with a historical standard deviation of 13 fights. To increase arrivals, a new air traffic control procedure is implemented. In the ...Find the critical value of Student's t for each hypothesis test. a. Two-tailed test, n = 18, α = .05 b. Right-tailed test, n = 15, α = .10 c. Left-tailed test, n = 31, α = .01Post your question