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Table 1 gives the frequency distribution of the rate of unemployment in a sample of 20 large U.S. cities in 1980.
(a) Find the mean, median, and mode of the unemployment rate.
Find the variance, standard deviation, and coefficient of variation.
Find the Pearson's coefficient of skewness and sketch the relative frequency histogram
Table 1 Frequency Distribution of Unemployment Rate
Unemployment Rate, %
Frequency
7.0-7.4
2
7.5-7.9
4
8.0-8.4
5
8.5-8.9
9.0-9.4
3
9.5-9.9
n = 20
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