2 years ago

Which of the following is a rational number but is NOT an natural number?

Mathematics

1 answer:

Tresset [83]2 years ago

3 0

Answer:

A. 404

Step-by-step explanation:

404 is a rational number but its not a natural number because 404 can only be divided by 1

and therefore its not a natural number

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<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

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$\sigma=\$13.00$

Significance level for 90% confidence = $\alpha=1-0.90=0.1$

Using t-value table , t-critical value for 90% confidence:

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Margin of error of $\mu$ : $E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39$

Interpretation : The repair cost will be within $12.39 of the real population mean value $\mu$ 90% of the time.

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