In one town, 36 of adults are employed in the tourism industry. What is the probability that three adults selected at random from the town are all employed in the tourism industry?
A) 0.047 B) 0.953 C) 0.262 D) 0.147
Q. 2Each year advertisers spend billions of dollars purchasing commercial time on network sports television. In the first 6 months of 1988, advertisers spent 1.1 billion.
A recent article listed the top 10 leading spenders (in millions of dollars): Company A 70.6 Company F 27.8 Company B 62.8 Company G 26.9 Company C 57.8 Company H 21.9 Company D 55.2 Company I 22.4 Company E 29.7 Company J 19.3 Calculate the mean amount spent. A) 39.44 million dollars B) 19.70 million dollars
C) 388.15 million dollars D) 51.30 million dollars
Q. 3Determine the critical value for a left-tailed test of a population mean at the a = 0.025 level of significance based on a sample size of n = 18.
A) -2.11 B) -3.222 C) 2.110 D) 2.101
Q. 4The repair costs for five cars which were crashed by a safety testing organization were as follows: 100, 150, 200, 250, and 150. Find the mean cost of repair.
A) 170 B) 160 C) 180 D) 140
Q. 5Determine the critical value for a right-tailed test of a population mean at the a = 0.005 level of significance with 28 degrees of freedom.
A) 2.763 B) 1.701 C) -2.763 D) 2.771
Q. 6Among the contestants in a competition are 45 women and 21 men. If 5 winners are randomly selected, what is the probability that they are all men?
A) 0.00228 B) 0.01666 C) 0.14735 D) 0.02213