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A. You have just recorded the waiting times for a random sample of 50 customers who visited Domino's Pizza Shop. The following table gives the
A. You have just recorded the waiting times for a random sample of 50 customers who
visited Domino's Pizza Shop. The following table gives the frequency distribution of
waiting times (in minutes) for these customers.
Waiting Time f
10 to less than 16 6
16 to less than 22 10
22 to less than 28 15
28 to less than 34 11
34 to less than 40 7
40 to less than 46 1
i). The mean waiting time, rounded to two decimal places, is:
ii). The variance of waiting times is:
iii). The standard deviation of waiting times is:
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