Exam 1a Fall 06 sec 010 KEY

# Exam 1a Fall 06 sec 010 KEY - ECON 2843 010 Exam 1 Fall...

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ECON 2843 – 010 Name KEY Exam 1 ID # Fall 2006 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 manager of the KCPA takes a random sample of the ages of those attending the Great Hall series at regular ticket rates. The data is shown in the table below. Age frequency 25 up to 35 4 35 up to 45 8 45 up to 55 12 55 up to 65 1 1. What is the median class? (6 points) 5 a. 25 up to 35 b. 35 up to 45 c. 45 up to 55 * d. 55 up to 65 2. Calculate the standard deviation for this sample and use the appropriate symbol. (8 points) a. 8 b. 8.165 * c. 64 d. 66.67 e. 75 3. Interpret/define the standard deviation? (6 points) It is the average deviation of the data points from the mean, and along with the variance, is the most commonly used measure of the dispersion of the data set. 4. What is the cumulative frequency of the class 35 up to 45? (6 points) a. .16 b. .25 c. .48 1

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d. 8 e. 12 * Questions 5 through 8 refer to the following. A New York bank frequently hires consultants for
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## This note was uploaded on 04/07/2008 for the course ECON 2843 taught by Professor Hudgins during the Spring '08 term at The University of Oklahoma.

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Exam 1a Fall 06 sec 010 KEY - ECON 2843 010 Exam 1 Fall...

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