The number of days (X) after mailout it takes a utility company to receive payment for a customer's bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days. About 16% of bills will be received earlier than days after mailout.

MATLAB: An Introduction with Applications
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The number of days (X) after mailout it takes a utility company to receive payment for a
customer's bill is a normal random variable with a mean of 31 days and a standard deviation of
6 days.
About 16% of bills will be received earlier than
days after mailout.
Transcribed Image Text:The number of days (X) after mailout it takes a utility company to receive payment for a customer's bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days. About 16% of bills will be received earlier than days after mailout.
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Step 1

given data normal distributionμ = 31 days σ = 6 daysabout 16% of bills will be received earlier than howmany days after mailout?

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