A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If an applicant is randomly selected, find the probability of a rating that is between 200 and 275.
A) 0.9332 B) 0.5 C) 0.0668 D) 0.4332
Q. 2Which measure of central tendency may not exist for all numeric data sets?
A) Mode B) Mean C) Median D) Midrange
Q. 3Find the z-score for which the area under the standard normal curve to its right is 0.09.
A) 1.26 B) 1.34 C) 1.45 D) 1.39
Q. 4A nationwide study of American homeowners revealed that 65 have one or more lawn mowers. A lawn equipment manufacturer, located in Omaha, feels the estimate is too low for households in Omaha.
Find the P-value for a test of the claim that the proportion with lawn mowers in Omaha is higher than 65. Among 497 randomly selected homes in Omaha, 340 had one or more lawn mowers.
A) 0.0505 B) 0.0252 C) 0.1118 D) 0.0559
Q. 5A researcher wanted to determine whether women with children are more likely to develop anxiety disorders than women without children. She selected a sample of 900 twenty-year old women and followed them for a twenty-year period.
At the start of the study, none of the women had children. By the end of the study 53 of the women had at least one child. The level of anxiety of each participant was evaluated at the beginning and at the end of the study and the increase (or decrease) in anxiety was recorded. The researchers analyzed the results to determine whether there was an association between anxiety and having children.
A) cohort; Individuals are observed over a long period of time.
B) retrospective; Individuals are asked to look back in time.
C) cross-sectional; Information is collected at a specific point in time.
Q. 6The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a standard deviation of 1.2 oz. What is the probability that the volume of soda in a randomly selected bottle will be less than 32 oz?
A) 0.5987 B) 0.4013 C) 0.0987 D) 0.3821
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