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(c) Estimate the percentage of customer accounts for which the number of days is between 12 and 42.(Choose one)of the customer accounts have payment made between 12 and 42 days.

Sagot :

According to the 68, 95, 99.7 rule, 99.7% of the data is in the range:

(μ - 3σ, μ + 3σ)

where μ is the mean, and σ is the standard deviation

In this case, μ = 27 and σ = 5. Then, this range is:

(27 - 3x5, 27 + 3x5)

(12 , 42)

99.7 % of the customer accounts have payment made between 12 and 42 days.

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