The Cambridge Power and Light Company selected a random sample of 20 residential
ID: 1204335 • Letter: T
Question
The Cambridge Power and Light Company selected a random sample of 20 residential customers. Following are the amounts, to the nearest dollar, the customers were charged for electrical service last month:
52
49
53
51
22
44
75
45
66
76
64
61
33
37
51
68
34
66
63
61
Compute the arithmetic mean.(Round your answer to 2 decimal places.)
The Cambridge Power and Light Company selected a random sample of 20 residential customers. Following are the amounts, to the nearest dollar, the customers were charged for electrical service last month:
Explanation / Answer
a. Compute the arithmetic mean.(Round your answer to 2 decimal places.)
The mean is $53.55.
b. Indicate whether it is a statistic or a parameter.
Statistic (because it is calculated from a sample)
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