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2.4.31 The mean value of land and buildings per acre from a sample of farms is...

2.4.31 The mean value of land and buildings per acre from a sample of farms is ​$1300 ​, with a standard deviation of ​$200 . The data set has a​ bell-shaped distribution. Assume the number of farms in the sample is 72 .

​(a) Use the empirical rule to estimate the number of farms whose land and building values per acre are between

​$1100

and

​$1500

.

Math   Statistics-And-Probability   
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Answer #1

So out of 72 Samples number of farms whose land and building values per acre are between $1100 and $1300 is

= 72×0.68 = 48.96 = 49 ( approximately)

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