QNT/275 Final

QNT/275 Final December 2017 Results of these answers is 26/30 (86.67%) If you can figure out which of the four questions are wrong, then you can get 100% The regression model y = A + Bx + e is: • a nonlinear model • a deterministic model • a probabilistic model • an exact relationship The mean of a discrete random variable is the mean of its: • frequency distribution • percentage distribution • probability distribution • second and third quartiles The p-value is the: • smallest significance level at which the null hypothesis cannot be rejected • largest significance level at which the alternative hypothesis can be rejected • largest significance level at which the null hypothesis can be rejected • smallest significance level at which the null hypothesis can be rejected A quantitative variable is the only type of variable that can: • be graphed • have no intermediate values • assume numeric values for which arithmetic operations make sense • be used to prepare tables To make tests hypotheses about more than two population means, we use the: • analysis of variance distribution • normal distribution • t distribution • chi-square distribution In a survey regarding job satisfaction, 574 in a sample of 934 female job-holders stated that they are satisfied with their jobs, while 500 in a sample of 755 male job-holders stated that they are satisfied with their jobs. The null hypothesis is that the proportions of all female and male job-holders who are satisfied with their jobs are the same. The alternative hypothesis is that the proportion of female job-holders who are satisfied with their jobs is lower than the proportion of male job-holders stated who are satisfied with their jobs. The significance level is 2.5%. What is the critical value of z for the hypothesis test? • -2.05 • -1.96 • -2.33 • -2.17 In a game of four-handed Hearts, all 52 cards of a standard deck are dealt, so that each player starts each round with 13 cards in a hand. Suppose player A’s hand has three clubs, six diamonds, two hears, and two spades. What is the relative frequency of spades, rounded to two decimal places, dealt to player A? • 0.75 • 0.15 • 1.5 • 0.25 Two events are independent if the occurrence of one event: • Means that the second event is certain to occur. • Does not affect the probability of the occurrence of the other event. • Affects the probability of the occurrence of the other event. • Means that the second event cannot occur. The model y = A + Bx is a: • Deterministic model