The diameter of ball bearings produced in a manufacturing process can be explained using a uniform distribution over the interval 2.5 to 4.5 millimeters. What is the probability that a randomly selected ball bearing has a diameter greater than 3.
3 millimeters?
A) 0.7333 B) 1.5 C) 0.4714 D) 0.6
Q. 2A newspaper article citing the results of a poll states: In theory, the results of such a poll, in 99 cases out of 100 should differ by no more than 2 percentage points in either direction from what would have been obtained by interviewing all
voters in the United States. Find the sample size suggested by this statement.
A) 165 B) 2402 C) 3394 D) 4145
Q. 3the weights of cases loaded onto an airport conveyor belt
A) qualitative B) quantitative
Q. 4Wingspan of Cardinal: The wingspan lengths, to the nearest hundredth of a millimeter, of a sample of 35 cardinals.
A) Limit grouping B) Cutpoint grouping
C) Single-value grouping D) None of these
Q. 5If the graph of a distribution of data shows that the graph is symmetric then the
A) Mean is a better measure of central tendency
B) Midrange is a better measure of central tendency
C) Median is a better measure of central tendency
D) Mode is a better measure of central tendency
Q. 6On a multiple choice test with 6 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the random variable X, the number of correct answers.
A) 2 B) 3 C) 4.5 D) 1.5
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