26 Which symbol represents a test statistic used to test a hypothesis about a population mean? a Question 35 Each salesperson in a large department store chain is rated on his or her sales ability and potential for advancement. The data for the 500 sampled salespeople are summarized in the following table. Potential for Advancement Fair Good Excellent Sales ability Below average 48 44 53 Average 61 80 118 Above average 37 16 43 What is the probability that a salesperson selected at random will have an excellent potential for advancement given he or she al: has average sales ability? 0.72 0.45 0.46 0.09 Question 36 2 pts Perfumes Company offers the person who purchases an 8-ounce bottle of Fragrance 1 two free gifts, chosen from the following: an umbrella, a 1-ounce bottle of Fragrance 2, a shaving kit, a raincoat, or a pair of boots. If you purchased Fragrance 1, what is the probability you randomly select an umbrella and a shaving kit in that order? 0.00 1.00 0.05 0.20 Question 37 2 pts A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. Number of Days Absent Probability 0 0.60 1 0.20 2 0.12 3 0.04 4 0.04 5 0.00 What is the variance of the number of days absent? 1.1616 1.41 5.00 55.52 Question 42 2 pts In cluster sampling, a population is divided into subgroups called clusters, and a sample is ra