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1.) In a mid-size company, the distribution of the number of phone calls answered each day...

1.) In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 48 and a standard deviation of 5. Using the empirical rule, what is the approximate percentage of daily phone calls numbering between 33 and 63?

Do not enter the percent symbol.
ans = %

2.) Approximate the mean for following GFDT.

Data Frequency
30 - 34 1
35 - 39 1
40 - 44 4
45 - 49 4
50 - 54 7
55 - 59 11
60 - 64 10
65 - 69 19
70 - 74 11



mean =

Report answer accurate to one decimal place

Math   Statistics-And-Probability   
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