Question

Question 10 (5 points)

Many hotel chains that offer free Wi-Fi service to their customers have experienced increasing demand for Internet bandwidth and increasing costs. Marriott International would like to test the hypothesis that the proportion of customers that are carrying two Wi-Fi devices exceeds 0.40. A random sample of 130 Marriott customers found that 63 have two Wi-Fi devices. Marriott International would like to set α = 0.05. The critical proportion for this hypothesis test would be ________.

Question 10 options:

	0.427
	0.443
	0.471
	0.504

Question 11 (5 points)

CoStar would like to test if the vacancy rate for "warehouse" stores is more than 8%. A random sample of 85 warehouse stores was selected and the number of vacant stores was counted. Assume that the true population proportion of vacant warehouse stores is 0.125. Using α = 0.05, beta equals ________.

Question 11 options:

	0.3627
	0.4091
	0.5557
	0.7188

Question 12 (5 points)

Breyers is a major producer of ice cream and would like to test the hypothesis that the average American consumes more than 17 ounces if ice cream per month. A random sample of 15 Americans was found to consume an average of 18.2 ounces of ice cream last month. The standard deviation for this sample was 3.9 ounces. Breyers would like to set α = 0.10. The critical sample mean for this hypothesis test would be ________.

Question 12 options:

	17.07
	17.46
	17.90
	18.35

Answer 1

О) 1. Зо - olio С? = 5,418 Л 13о - Test statistics. 0443 - 6tto 2. IP (1-P) огцо (1 - 614 n 130 - Otog ! оцоо, 6 13. О18 °, 24 1.Зо (169 бгоо|34 6 o168 o4 2-96, (, 86

option A is correct 7 = 11.8.61 2. P(Z > 1136 = (-:P (2.21.56) D. 4-27 (12, Sample Size (n) 15 population mean (Ms. 17 Sample mean (T) 18,2 Standard devialin ) 3.9 220110 level of significance - To test the hypothesis. HoiM = 17 vs Haill >17 D t X-M slm CS

Where to tani 3) s +M. Un Ollo, 15-1 11345 7 = 1.3454 3ig vo + 17 = 1.345 & 3.9 t17 3,3729 1345 * 1,0069943 +1.7 12345 * 110069273412 1.3544 11 +17 18.35 - Coritical Sample mean is 18.35 option 'D' is correct CS