ch03

# ch03 - Ch.3 NumericallySummarizingData 3.1...

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Ch. 3 Numerically Summarizing Data 3.1 Measures of Central Tendency 1 Determine the Arithmetic Mean of a Variable from Raw Data MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The scores of the top ten finishers in a men ʹ s golf tournament are listed below. 65 66 67 66 67 70 67 70 71 68 Find the mean. A) 67.7 B) 65.5 C) 71.1 D) 70.0 2) The scores of the top ten finishers in a women ʹ s golf tournament are listed below. 71 67 67 72 76 72 73 68 72 72 Find the mean. A) 71 B) 67 C) 68 D) 72 3) If X 1 , X 2 , X 3 , ..., X N are the N observations of a variable from a population, then the population mean is symbolized by A) μ B) X C) Σ D) X ~ 4) A descriptive measure of a population is a A) Parameter B) Statistic C) Variable D) Qualitative response 2 Determine the Median of a Variable from Raw Data SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) The numbers of home runs that a baseball player hit in the first 13 years of his major league baseball career are listed below. 3 49 32 33 39 22 42 9 9 39 52 58 70 Find the mean and median number of home runs. Round the mean to the nearest whole number. 2) The numbers of runs batted in that a baseball player had in the first 12 years of his major league baseball career are listed below. 102 56 25 9 9 56 165 88 122 150 91 114 Find the mean and median number of runs batted in. Round the mean to the nearest whole number. Which measure of central tendency - the mean or the median - best represents the data? Explain your reasoning. Page 46

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 3) The scores of the top ten finishers in a men ʹ s golf tournament are listed below. 65 66 67 66 67 70 67 70 71 68 Find the median score. A) 67 B) 66 C) 68 D) 70 4) The scores of the top ten finishers in a women ʹ s golf tournament are listed below. 71 67 67 72 76 72 73 68 72 72 Find the median score. A) 72 B) 67 C) 71 D) 73 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 5) The amounts of money won by the top ten finishers in a famous car race are listed below. \$1,172,246 \$163,659 \$440,584 \$350,634 \$290,596 \$186,731 \$145,809 \$143,209 \$139,096 \$125,106 Find the mean and median winnings. Round the median to the nearest dollar. Which measure - the mean or the median - best represents the data? Explain your reasoning. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 6) The median of a data set for a variable is the data value that A) Lies in the middle of the data when the data is arranged in ascending order. B) Appears the most often C) Is the average, that is, the sum of all the data values of the variable divided by the number of observations in the data set? D) None of these 7) The following data represents a random sample of 15 complaints registered with the customer service department of a store. Determine the median complaint.
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## This note was uploaded on 06/06/2010 for the course EC 11 taught by Professor All during the Spring '10 term at UCLA.

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ch03 - Ch.3 NumericallySummarizingData 3.1...

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