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Ivenika [448]
3 years ago
14

To fit between two windows, the width of a bookshelf must be no greater than 6.5 feet. Mrs. Aguilar purchases a bookshelf that i

s 77 inches wide. Which statement describes the relationship between the width of the bookshelf and the distance between the windows?
Mathematics
1 answer:
Ratling [72]3 years ago
3 0
The bookshelf is one inch smaller that 6.5 feet. 

6 feet = 6 x 12 = 72 + 6 in(for the half foot) = 78 inches. 

So bookshelf < windows
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lutik1710 [3]

Answer:

a) z = 1.645

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Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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M = z*\frac{\sigma}{\sqrt{n}}

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(b) If the group wants their estimate to have a maximum error of $12, how many small claims should they sample?

They should sample at least n small claims, in which n is found when

M = 12, \sigma = 124.88. So

M = z*\frac{\sigma}{\sqrt{n}}

12 = 1.645*\frac{124.88}{\sqrt{n}}

12\sqrt{n} = 205.43

\sqrt{n} = \frac{205.43}{12}

\sqrt{n} = 17.12

\sqrt{n}^{2} = (17.12)^{2}

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The should sample at least 293 small claims.

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