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Tatiana [17]
3 years ago
12

Find the left critical value for 95% confidence interval for σ with n = 41. 26.509 24.433 55.758 59.342

Mathematics
1 answer:
Makovka662 [10]3 years ago
7 0

Answer: 59.342

Step-by-step explanation:

The chi-square critical values are used to find the confidence interval for σ.

Left critical value = \chi^2_{\alpha/2, n-1} [i.e. chi-square value from chi-square table corresponding to degree of freedom n-1 and significance level of \alpha/2]

To find : left critical value for 95% confidence interval for σ with n = 41.

Significance level : \alpha=1-0.95=0.05

degree of freedom = 41-1=40

Now, the  left critical value for 95% confidence interval for σ with n = 41 is the chi-square value corresponding  to degree of freedom n-1 and \alpha/2=0.025

=59.342  [from chi-square table ]

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