03 STAT HWA q frequency distributions

# 03 STAT HWA q frequency distributions - Dr. Valerie R....

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Dr. Valerie R. Bencivenga Economics 329 PRACTICE HOMEWORK #3A: FREQUENCY DISTRIBUTIONS 1. For each of the following cases, draw a simple example of a relative frequency histogram. (D raw “stylized” relative frequency histograms that are smooth curves.) a. the distribution of X is symmetric b. mode > median > mean c. the distributions of X and Y have the same mean but Y has a larger variance d. the distributions of X and Y have the same variance but the mean of X is smaller e. the distribution of Y has a larger mean and a larger variance than the distribution of X 2. Below is the relative frequency distribution of the sizes of public schools (elementary through high school), measured in terms of the number of students enrolled, in 1987-88. Also reported for each class interval is the percentage of students attending schools of a size in that interval. (Source: Statistical Abstract of the U.S. , 1990, pg.138.) Class Interval Percentage of Schools Percentage of Students < 100 9.01 .95 100 to < 200 11.31 3.48 200 to < 300 12.90 6.62 300 to < 400 14.93 10.67 400 to < 500 13.78 12.61 500 to < 600 11.10 12.40 600 to < 700 7.80 10.28 700 to < 800 5.36 8.16 800 to < 1,000 5.82 10.53 1,000 to < 1,500 5.17 12.67 1,500 to < 2,000 1.71 5.99 2,000 to < 3,000 .99 4.72 3,000 or more

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## This note was uploaded on 02/26/2012 for the course ECONOMICS 329 taught by Professor Bencivenga during the Spring '12 term at University of Texas at Austin.

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03 STAT HWA q frequency distributions - Dr. Valerie R....

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