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lyudmila [28]
3 years ago
13

HHHHHHHHHHHHHHHHHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPPPP 30 POINTS

Mathematics
1 answer:
Vinvika [58]3 years ago
7 0

Answer:

7.28 units

Step-by-step explanation:

Using the Pythagorean theorem, a^{2} + b^{2} = c^{2}, we get:

2^{2}+7^{2}=c^{2}\\4+49=c^{2}\\53=c^2\\\sqrt{53}=c\\c=\sqrt{53}

\sqrt{53} ≈ 7.28

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For each level of precision, find the required sample size to estimate the mean starting salary for a new CPA with 95 percent co
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Answer:

(a) Margin of error ( E) = $2,000 , n = 54

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Step-by-step explanation:

Given -

Standard deviation \sigma = $7,500

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Margin of error ( E)  = Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}

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Squaring both side

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n =  54.0225

n = 54 ( approximately)

(b)   Margin of error ( E) = $1,000

          E     = Z_{\frac{\alpha}{2}}\frac{\sigma}{\sqrt{n}}

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Squaring both side

1000^{2} = 1.96^{2}\times\frac{7500^{2}}{n}

n =\frac{1.96^{2}}{1000^{2}} \times 7500^{2}

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(c)   Margin of error ( E) = $500

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  500 = Z_{\frac{.05}{2}}\frac{7500}{\sqrt{n}}

Squaring both side

500^{2} = 1.96^{2}\times\frac{7500^{2}}{n}

n =\frac{1.96^{2}}{500^{2}} \times 7500^{2}

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