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Section 1 True or False l) Smtistics are used as abasis for making decisions. 2] To infer something about a population, we usually take a sample from the population 3) Descriptive smtistics are used to nd out something about a population based on a sample. 4) In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category. 5) To convat a frequmcy distribution to a relative frequency distribution, divide each class frequency by the number of classes. 6] To construct a pie chart, relative class frequencies are used to graph the "slices" ofthe pie. 7) The interval level ofmeasurement contains a natural zero point 8) Quantitative variables are number variables 9) lfn equals 67, kwill equal 6 10) If k equals 5, min equals 42 and max equals 189, I could equal 30 Section 2 Multiple Choice 1 1) When TV advertisemmts report that "2 out of 3 daltists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because A) the sample was only 5 dentists. B) the sample of dentists is clearly explained. C) the advertisement does not include the total number of dentists surveyed. D) the conclusion is not illustrated with a graph. 12) IfGallup, Harris, and other pollsters asked people to indicate their political party a'iliations as Democrat, Republican, or indepasdmt, the data gathered would be an example of which scale ofmeasuremmt? A) Nominal B) Ordinal C) Intocal D) Ratio 13) Monthly commissions of rst-year insurance brokers are 331,2 70, $1,310, $1,680, 51,3 80, $1,410, $1,570, $1,180, and $1,420. These gures are referred to as A) a histogram. B) raw data. C) a frequency distribution. D) a frequency polygon 14) A student was interested in the cigaretteesmoking habits of college students and collected data from an unbiased random sample of students. The data are summarized in the following table: Males who smoke Males who do not smoke Females who smoke Fanales who do not smoke What is wrong with this frequency table? A) The number ofmales does not equal the sum ofmales that smoke and do not smoke. B) The classes are not mutually exclusive. C) There are too many classes. D) Class limits cannot be computed