In a bar chart, the heights of the bars represent the frequencies in each class. A) True B) False The interquartile range is graphically presented in a A) Dot plot. B) Stem-and-leaf display. C) Box plot. D) Contingency table. Outliers are clearly presented in a A) Dot plot. B) Stem-and-leaf display. C) Box plot. D) Contingency table. A new car was put into production. It involved many assembly tasks. Each car was inspected at the end of the assembly line and the number of defects per unit was recorded. For the first 100 cars produced, there were 40 defective cars. Some of the cars had no defects; a few had one defect, and so on. The distribution of defects followed a Poisson distribution. Based on the first 100 produced, about how many out of every 1,000 cars assembled should have one or more defects? A) About 660 B) About 165 C) About 630 D) About 330 The Central Limit Theorem states that if the sample size, n, is sufficiently large, the sampling distribution of the means will be approximately normal, even when the population is skewed or uniform. A) True B) False Based on the central limit theorem, the sample mean can be used as a good estimator of the population mean, assuming that the size of the sample is sufficiently large. A) True B) False In multiple regression analysis, how is the degree of association between a set of independent variables and a dependent variable measured? A) Confidence intervals. B) Autocorrelation. C) Coefficient of multiple determination. D) Standard error of estimate.

In a bar chart, the heights of the bars represent the frequencies ineach class.A) TrueB) FalseThe interquartile range is graphically presented in aA) Dot plot.B) Stem-and-leaf display.C) Box…

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In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected?

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In a bingo game, balls numbered 1 to 75 are in a bin. Balls are randomly drawn and not replaced. Find the probability of the first five balls drawn:

P(5 even numbers or 5 numbers less than 30)

(the answer is ~0.032)

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In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 4.19 cm. This pressure is transmitted by a liquid to a second piston of radius 20.9 cm. What force must the compressed air exert in order to lift a car weighing 12000 N? Answer in units of N. What air pressure will produce this force? Answer in units of Pa.

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In a case-control study of risk factors of colon cancer, 430 cases were compared with 551 controls. The investigators used a questionnaire to obtain information about demographic variables, socioeconomic variables (e.g., education), weight, and height, among other variables. Using the self-reported weight and height information, body mass index [BMI, weight (kg)/height (m)2] values were calculated. Participants with BMI  30 kg/m2 were considered “obese.” The association between obesity and colon cancer in this study is shown in the table.

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