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# Eco5_exam1 - the summer for a sample of fifteen students 40...

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Eco 5 Spring o6 Name: Section Exam # I I. ( 16 points ).The following is a frequency distribution for the ages of a sample of employees at a local company. Age Frequency 30 - 39 2 40 - 49 3 50 - 59 7 60 - 69 5 70 - 79 1 a. Determine the average age for the sample and the median age. b. Compute the first and third quartiles c. Compute the standard deviation. d. Compute the coefficient of variation. e. Draw a box plot . What is the distribution of the data? Is there any outlier in this data set? f. What proportion of the ages of employees is between 74 and 34? II. ( 4 points ). A researcher has obtained the number of hours worked per week during

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Unformatted text preview: the summer for a sample of fifteen students. 40 25 35 30 20 40 30 20 40 10 30 20 10 5 20 Using this data set, compute the a. median b. mean c. mode d. 40th percentile 1 Bonus question:( 4 points ) Below you are given the examination scores of 20 students. 52 99 92 86 84 63 72 76 95 88 92 58 65 79 80 90 75 74 56 99 a. Construct a frequency distribution for this data. b. Construct a cumulative frequency distribution. c. Draw an ogive. d. Based on the ogive what percentage of the students has a score of 85? 30% of the students has a score of …………….? 2...
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Eco5_exam1 - the summer for a sample of fifteen students 40...

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