Question

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

.

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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number of farms whose land and building values per acre are between
$1100 and $1500 . 49 farms (Round to the nearest whole number
as needed.) (b) If 24 additional...

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farms is $1700, with a standard deviation of $200. The data set has
a bell-shaped distribution. Assume the number of farms in the
sample is 71.
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a bell-shaped distribution. Assume the number of farms in the
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sample of farms is
$1800
with a standard deviation of
$200
The data set has a bell-shaped distribution.
Assume the number of farms in the sample is
75
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farms whose land and building values per acre are between
$1600
and
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with a standard deviation of $300
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and ?$1900. ____ farms ?(Round to the nearest whole number as?
needed.) ?(b) If 20 additional farms were? sampled, about...

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