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A random sample of 20 observations showed a standard deviation of 8. At 95% confidence, test...

A random sample of 20 observations showed a standard deviation of 8. At 95% confidence, test to see if the variance of the population is significantly less than 65. State the null and alternative hypotheses.

Select one:

A. H0: Sigma_Small.gif2LessThanOrEqualTo.gif 65 Ha: Sigma_Small.gif2 > 65

B. H0: Sigma_Small.gif2GreaterThanOrEqualTo.gif 65 Ha: Sigma_Small.gif2 < 65

C. H0: Sigma_Small.gif2 = 65 Ha: Sigma_Small.gif2NotEqualTo.gif 65

D. None of the above answers is correct

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Answer #1

TOPIC:Null and alternative hypothesis for the given test.

)The answe vo is B / Explanation n=sample size 20, = 8 . sample sd a0.05, dor 95. confi dence level, Popu lation vanuance Cla

(The null and alternative hypothesis should be disjoint and exhaustive).

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