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Savatey [412]
3 years ago
8

1/3m- 1- 1/2n when m = 21 and n = 12

Mathematics
1 answer:
andrezito [222]3 years ago
7 0

1/3m - 1 - 1/2n

= 1/3( 21) - 1 -  1/2 (12)

= 7 - 1 - 6

= 6 - 6

= 0

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The formula to find the confidence interval for population mean is given :-

\overline{x}\ \pm\ t_{\alpha/2}\dfrac{s}{\sqrt{n}}

, where n = sample size.

t_{\alpha/2} = Two-tailed t-value for significance level of (\alpha) and degree of freedom df= n-1.

s = sample standard deviation.

As per given , we have

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95% Confidence interval for population mean:

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