Practice Test for Exam 1

Practice Test for Exam 1 - ISDS 2000 Practice for Test #1...

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ISDS 2000 – Practice for Test #1 – Fall 2008 1. A summary measure that is computed to describe a characteristic of a sample taken from a population is called: a. a parameter b. a census c. a statistic d. the scientific method 2. Which of the following is most likely a population as opposed to a sample? a. respondents to a national call-in talk radio show b. the first five students completing an assignment c. every third person to arrive at a bank d. registered voters in a county 3. A consumer group is examining the actual weight of candy bars produced by a company with a reputation for inaccurate content labels. The type of variable most appropriate to their measurements is: a. qualitative, discrete b. qualitative, continuous c. quantitative, discrete d. quantitative, continuous ------------------------------------------------------------------------------ Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid but who have no private health insurance. The data she collected are arranged in a stem-and-leaf display. Use the age data below to answer questions 4-15. 6|01234555689 7|0334566 8|112679 9|02 4. The average age of these citizens is a. 73.58 b. 73 c. 65 d. 74.37 5. The median age of these citizens is a. 70 b. 73 c. 74 d. 71 6. The mode of the age of these citizens is a. 73 b. 70 c. 68 d. 65 7. The range of the age of these citizens is a. 32 b. 30 c. 15 d. 28
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8. The sample variance of the age of these citizens is a. 92.32 b. 96.01 c. 9.61 d. 9.80 e. none of the above 9. The standard deviation is a. 92.32 b. 96.01 c. 9.61 d. 9.80 e. none of the above 10. The sample appears to have a distribution that is a. uniform b. left-skewed c. right-skewed d. bimodal 11. Suppose you were to construct a frequency distribution representing the sample of ages. For six classes, the best value of width is: a. 2 b. 5 c. 6 d. 10 12. For a width of 5, if the first class has a lower limit of 60, how many senior citizens would be classified into the second class? a. 3 b. 5 c. 6 d. 10 13. What proportion of senior citizens are 70 years of age or older? a. .4231 b. .5769 c. .5384 d. .6154 14. Based on the empirical rule, approximately what percentage of senior citizens are expected to be between 64 and 83 years old. a. 99%
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This note was uploaded on 03/11/2010 for the course ISDS 2000 taught by Professor Nunnery during the Fall '08 term at LSU.

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Practice Test for Exam 1 - ISDS 2000 Practice for Test #1...

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