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Tutorial 3 1. The frequency distribution representing the number of frequent flier miles accumulated by employees at Burnley Statistical Consulting Company is repeated from exercise 11 Frequent Filer Miles 0 up to 3 3 up to 6 6 up to 9 9 up to 12 12 up to 15 Total

Number of employes 5 12 23 8 2 50

a. How many employees accumulated less than 3,000 miles? b. Convert the frequency distribution to a cumulative frequency distribution? c. Portray the cumulative frequency polygon, about 75 percent of the employees accumulated how many miles or less? 2. The frequency distribution of order lead time at Ecommerce.com from exercise 12 is repeated below. Lead time(days) 0 up to 6 5 up to 10 10 up to 15 15 up to 20 20 up to 25 Total

a. b. c. d.

Frequency 6 7 12 8 7 40

How many orders were filled in less than 10 days?In less than 15 days? Convert the frequency distribution to a cumulative frequency distribution? Develop a cumulative frequency polygon? About 60 percent of the orders were filled in less than how many days?

3. Given below is the relative frequency distribution for the amount of medical leave days for 50 staffs in JD Company Classes 20 - 24 25 - 29 30 - 34 35 - 39 40 -44 45 - 49

Relative frequency 0.24 0.26 0.16 14 0.12 0.08

a. Prepare frequency distribution table and calculate the percentage b. Construct a cumulative frequency distribution table and draw an ogive.