Find the standardized test statistic, z, to test the hypothesis that p1 p2. Use = 0.02. The sample statistics listed below are from independent samples. Sample statistics: n1 = 1000, x1 = 250, and n2 = 1200, x2 = 195
A) 5.087 B) 2.798 C) 4.761 D) 3.212
Q. 2Find the critical t-value that corresponds to 90 confidence and n = 15.
A) 1.345 B) 1.761 C) 2.145 D) 2.624
Q. 3Find the standardized test statistic, z, to test the hypothesis that p1 < p2. Use = 0.10. The sample statistics listed below are from independent samples. Sample statistics: n1 = 550, x1 = 121, and n2 = 690, x2 = 195
A) -2.513 B) -2.132 C) -0.985 D) 1.116
Q. 4The number of traffic accidents that occur on a particular stretch of road during a month follows a Poisson distribution with a mean of 7.5. Find the probability of observing exactly five accidents on this stretch of road next month.
A) 0.109375 B) 1.332455 C) 0.805166 D) 9.808925
Q. 5Find the critical t-value that corresponds to 95 confidence and n = 16.
A) 1.753 B) 2.131 C) 2.602 D) 2.947
Q. 6You are playing roulette at a casino in the United States. The wheel has 18 red slots, 18 black slots, and two green slots. In 4 spins of the wheel what is the probability of at least one red? Round to the nearest ten-thousandth.
A) 0.9048 B) 0.9375 C) 0.0625 D) 0.0953
Q. 7Which type of bias occurs because we do not obtain complete information about a population?
A) sampling bias B) response bias C) nonresponse bias D) no bias
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