If the apartment numbers in a large building are looked upon as data, they would fall into the _______
category.
A) nominal B) ordinal C) interval D) ratio
Q. 2Suppose the state decides to randomly test high school wrestlers for steroid use. There are 16 teams in the league, and each team has 20 wrestlers.
State investigators plan to test 32 of these athletes by randomly choosing two wrestlers from each team. Is this a simple random sample?
A) No, because not all possible groups of 32 wrestlers could have been the sample.
B) Yes, because each wrestler is equally likely to be chosen.
C) No, because a random sample of teams was not first chosen.
D) Yes, because stratified samples are a type of simple random sample.
E) Yes, because the wrestlers were chosen at random.
Q. 3True or False: The trials of a binomial experiment must be mutually exclusive of each other.
A) False B) True
Q. 4If P(X) = 0.4 and P(Y) = 0.5, and if X and Y are mutually exclusive, find P(X').
A) 0.5 B) 0.6 C) 0.4 D) 0.9
Q. 5Construct a 95 confidence interval for the population mean, . Assume the population has a normal distribution. A sample of 25 randomly
English majors has a mean test score of 81.5 with a standard deviation of 10.2. Round to the nearest hundredth.
A) (77.29, 85.71 ) B) (87.12, 98.32 ) C) (56.12, 78.34 ) D) (66.35, 69.89 )
Q. 6Find the z-scores for which 90 of the distribution's area lies between -z and z.
A) (-2.33, 2.33 ) B) (-1.645, 1.645 ) C) (-0.99, 0.99 ) D) (-1.96, 1.96 )
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