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STAT QUA2220-Three telecommunications companies reported

Author:
January 11th, 2018

Three telecommunications companies reported their mean monthly profi t and standard deviations for a year. The results are presented below.Company ACompany BCompany CMean10,93013,00034,450Standard Deviation4,1969,3604,116a. For each company, find an interval within which you would expect 95.44 percent of all monthly profit values to fall (assuming that prof its are normally distributed).b. Using the intervals you computed in part (a), compare the three companies with respect to mean monthly profits and variability of profits.c. Calculate the coefficient of variation for each company, and use the results to compare profits. Which company is more variable?

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