N = 9 H0 : 50 = 47
Ha : 50 s = 3
Assume data are from normal population. The p-value is equal to:.
a. 0.0171.
b. 0.0805.
c. 0.2705.
d. 0.2304.

The p-value is 0.809.

Step-by-step explanation:

In this case we need to perform a significance test for the standard deviation.

The hypothesis is defined as follows:

H₀: σ₀ = 4 vs. Hₐ: σ₀ ≤ 4

The information provided is:

n = 9

s = 3

Compute the Chi-square test statistic as follows:

The test statistic value is 4.5.

The degrees of freedom is:

df = n - 1

   = 9 - 1

   = 8

Compute the p-value as follows:

*Use a Chi-square table.

Thus, the p-value is 0.809.

step-by-step explanation:

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step-by-step explanation:

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