Concept explainers
(a)
To calculate: The population mean and the standard deviation of the number of degrees awarded each year at each university for the following frequency distribution table:
University A |
University B |
Number of degree Number of years |
Number of degree Number of years |
3 5 |
3 5 |
4 7 |
4 10 |
5 8 |
5 3 |
6 2 |
6 3 |
7 1 |
7 0 |
8 2 |
8 4 |
(b)
The University producing more degrees per year on average. University A has mean of the number of degrees awarded at the end of each year is 4.72 and University B has mean of the number of degrees awarded at the end of each year is 4.8.
(c)
The University producing more consistent numbers of degrees per year. University A has the variance of 1.96 and that of University B is 2.72.
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