Question

A random sample of 12-ounce milkshakes from 11 fast-food restaurants had the following number of calories. Assume the population Mandard edition is 473 476 700 375 642 608 510 591 450 500 472 a. What is the point estimate for the mean of 2-ounce milkshakes from all fast-food restaurants of the same chain b. What is the appropriate standard deviation to use in computing the confidence interval? c. Calculate the appropriate critical value (Z a/2 or tw/2) at 89% confidence level d. Calculate the margin of error for 89% Confidence level e. Compute the 89% confidence Interval for 2-ounce milkshakes from all fast-food restaurants of the same chain? 445,-435, d 425, 415 For this question, type in the 5 answers you got for each sub-question starting with the corresponding letter. Example a=456, T T Arial 3 (12pt) T E

Answer 1

from the given data, We have nan con Sample mean (e) - 5877 = 634, 2727 .point Estimate for the mean @ 21534. 2727) b) standard deviation 6) =189] ( given @ At 894. confidence level, ao 1-0.899 0.11 dies 0.055 Zouitical ? 28.055 = 1,598) e) Margin of Error (M. E) = Zorihical* - -1.598 * 89 =[42.8815

e 89% confidence interval for 2-ounce milkshakes pod restaurants of the same chain fror IR + ME = 534 + 42.8815 = 491 1185, 5768815 = 1491,119, 576.882] Round to 3 decimal places