Exam 1a Fall 04 KEY-1 - ECON 2843 010 Exam 1 Fall 2004 Form...

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ECON 2843 – 010 Name Exam 1 ID # Fall 2004 Lab Instructor Form A Lab Meeting Time Students must show all work on problems that involve calculation. Questions 1 through 4 refer to the following. The table shows the distribution of the number of reviewers per manuscript in a sample of new published textbooks this year. The results are taken from a sample of 150 reviewers. Number of relative Reviewers frequency 3 up to 5 .06 6 up to 8 .16 9 up to 11 .22 12 up to 14 .28 15 up to 17 .28 1. Calculate the sample mean. 5 a. .0779 b. .67 c. 10 d. 11.68 * e. approximately 12 2. What is the median age class? a. 3 up to 5 b. 6 up to 8 c. 9 up to 11 d. 12 up to 14 * e. 15 up to 17 3. What is the modal class? Both classes 12 to 14 and 15 to 16 4. Calculate the cumulative relative frequency of the class 6 - 8. a. .16 b. .22 * c. .42 d. 7 1
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e. 24 Questions 5 – 9 refer to the following: A survey of anniversary cards bought last month by husbands and wives showed that 15% of the cards were expensive. Among the cards bought by husbands, forty percent were expensive.
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Exam 1a Fall 04 KEY-1 - ECON 2843 010 Exam 1 Fall 2004 Form...

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