3 years ago

What is 45 as a fraction?

Mathematics

1 answer:

Rama09 [41]3 years ago

7 0

A whole number is always written as itself over one.

45/1

Answer: 45/1

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$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

Step-by-step explanation:

We have the following info:

$ME = 50$ margin of error desired

$\sigma = 1000$ the standard deviation for this case

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

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The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=0.01$ . And for this case would be $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

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So the answer for this case would be n=2663 rounded up to the nearest integer

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Step-by-step explanation:

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