Unformatted text preview: grade was selected and the results representing the inner diameters of the tires, ranked from smallest to largest are as follows. a. For each of the two grades of tires, compute the mean and standard deviation. b. For each of the two grades of tires, compute the coefficient variation and compare the result. 4. These data are the times (in minutes) taken to commute from home to work for 20 workers. Construct a stem and leaf plot for the above data. 5. The following table shows the frequency distribution of telephone bills for February 2015 for a sample of 50 families. Amount of Telephone Bill (RM) Number of families 40 – 69 8 70 – 99 10 100 – 129 16 130 -159 11 160 - 190 5 Calculate the mean, variance and standard deviation....
View Full Document
- Spring '14
- Standard Deviation, Frequency distribution, Operations Manager, relative frequency distribution, 575 mm