An electronics store receives a shipment of 49 flat screen TVs of which 5 are defective. During the quality control inspection, 4 TVs are selected at random from the shipment for testing.
The random variable X represents the number of defective computers in the sample A) hypergeometric; N = 49, n = 4, k = 5, x = 0, 1, 2, 3, 4
B) hypergeometric; N = 49, n = 5, k = 4, x = 0, 1, 2, 3, 4
C) hypergeometric; N = 49, n = 4, k = 5, x = 0, 1, 2, . . . , 5
D) not hypergeometric
Q. 2A candidate for state representative of a certain state claims to be favored by at least half of the voters. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis?
A) There is not sufficient evidence to reject the claim p = 0.5.
B) There is sufficient evidence to reject the claim p = 0.5.
C) There is sufficient evidence to support the claim p = 0.5.
D) There is not sufficient evidence to support the claim p = 0.5.
Q. 3The ages of five randomly chosen cars in a parking garage are determined to be 7, 9, 3, 4, and 6 years old. If we consider this sample of 5 in groups of 3, what is the probability of the population mean falling between 5.5 and 6.5 years?
A) 0.5 B) 0.4 C) 0.55 D) 0.6
Q. 4Find P(A or B) given that P(
A) = 0.5, P(B) = 0.2, and A and B are mutually exclusive.
A) 0.7 B) 0 C) 0.1 D) 0.3
Q. 5A jury is to be selected from a pool of 39 potential jurors. The defendant faces the death penalty if convicted. Of the potential jurors, 7 are opposed to the death penalty. The jury consists of 12 randomly selected jurors.
The random variable X represents the number of jurors who oppose the death penalty. A) hypergeometric; N = 39, n = 12, k = 7, x = 0, 1, 2, . . . , 7
B) hypergeometric; N = 39, n = 7, k = 12, x = 0, 1, 2, . . . , 7
C) hypergeometric; N = 39, n = 12, k = 7, x = 0, 1, 2, . . . ,12
D) not hypergeometric
Q. 6The ages of five randomly chosen cars in a parking garage are determined to be 7, 9, 3, 4, and 6 years old. If we consider this sample of 5 in groups of 3, how many groups can be formed?
A) 10 B) 5 C) 30 D) 60
Q. 7A candidate for state representative of a certain state claims to be favored by at least half of the voters. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis?
A) There is sufficient evidence to reject the claim p = 0.5.
B) There is not sufficient evidence to reject the claim p = 0.5.
C) There is sufficient evidence to support the claim p = 0.5.
D) There is not sufficient evidence to support the claim p = 0.5.
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