STAT 270 Lecture 11: 3.4.1 Independence

The data represent the number of customers waiting for a table at 7 pm for 40 consecutive Saturdays.

9,9,8,9,4,9,11,6,

13,10,6,8,4,7,5,10,

10,11,8,3,6,7,6,10,

13,11,12,6,10,7,9,10,

9,9,8,9,4,9,11,6.

Fill this table for absolute and relative frequencies.

Compute the mean and variance of the following probability distribution.

5. The number of items rejected daily by a manufacturer because of defects was recorded for the past 30 days. The results are as follows:
4 9 13 7 5 8 12 15 5 7 3
8 15 17 19 6 4 10 8 22 16 9
5 3 9 19 14 13 18 7
Construct a histogram.