# Question: The number of defective microchips produced by machine 6

The number of defective microchips produced by machine # 6 during each of the last 24 hours of operation is shown in the frequency table below:

Defectives x No. of hours f(x)

0........... 9

1.......... 6

2.......... 4

3.......... 3

4.......... 2

Total = 24

a. Compute the mean number of defectives per hour over the 24-hour period. (Treat the data as a population.)

b. What is the median number of defectives per hour?

c. Compute the variance and the standard deviation for the hourly defective counts.

Defectives x No. of hours f(x)

0........... 9

1.......... 6

2.......... 4

3.......... 3

4.......... 2

Total = 24

a. Compute the mean number of defectives per hour over the 24-hour period. (Treat the data as a population.)

b. What is the median number of defectives per hour?

c. Compute the variance and the standard deviation for the hourly defective counts.

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