We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is A)$\sigma$

Question

We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is A)$\sigma$ < 7 B)$\sigma$² $\ge$ 7 C)S < 49 D)S > 49

Quizplus · Accepted Answer

The correct null hypothesis for testing variance is that the population variance is equal to or greater than the test value. In this case, the test value is 7. Therefore, the null hypothesis is S >= 7. Choice A has the symbol for population standard deviation, not variance. Choice C and D do not include the test value of 7.

We Are Interested in Testing to See If the Variance σ\sigmaσ

We Are Interested in Testing to See If the Variance $\sigma$