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3 years ago

a certain math textbook is 3/4 of an inch thick. how many of these books will fit on a self that is 3 feet wide?

Mathematics

1 answer:

kherson [118]3 years ago

5 0

3 ft = 12 * 3 = 36 inches wide

36 / (3/4) =
36 * 4/3 =
144/3 =
48 books can fit

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Answer:

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And for the deviation we have:

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And that value represent the best estimator for the population deviation since:

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Step-by-step explanation:

For this case we have the following data:

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The first step for this cae is find the sample mean with the following formula:

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And now we can calculate the sample variance with the following formula:

$s^2 =\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132$

And for the deviation we have:

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And that value represent the best estimator for the population deviation since:

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