After completing sales training for a large company, it is expected that the salesperson will generate a sale on at least 15 percent of the calls he or she makes.
To make sure that the sales training process is working, a random sample of n = 400 sales calls made by sales representatives who have completed the training have been selected and the null hypothesis is to be tested at 0.05 alpha level. Suppose that a sale is made on 36 of the calls. Based on this information, what is the test statistic for this test?A) Approximately 0.1417
B) About z = -3.35
C) z = -1.645
D) t = -4.567
Q. 2Which of the following statements is true?
A) A binomial distribution with n = 20 and p = 0.05 will be right-skewed.
B) A binomial distribution with n = 6 and p = 0.50 will be symmetric.
C) A binomial distribution with n = 20 and p = 0.05 has an expected value equal to 1.
D) A, B, and C are all true.
Q. 3Which of the following is the minimum number of required replications per cell for a two-factor ANOVA design if you plan to test for interactive effects between factors A and B?
A) 3
B) 1
C) 2
D) 5
Q. 4Which of the following is true with respect to the binomial distribution?
A) As the sample size increases, the expected value of the random variable decreases.
B) The binomial distribution becomes more skewed as the sample size is increased for a given probability of success.
C) The binomial distribution tends to be more symmetric as p approaches 0.5.
D) In order for the binomial distribution to be skewed, the sample size must be quite large.
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