Question

Which of the following alternative hypotheses is two-sided (or two-tailed)?

a) The mean is greater than 10.
b) The mean is equal to 10.
c) The mean is less than 10.
d) The variance is not equal to 10.

Answer 1

The two-sided (or two-tailed) alternative hypothesis is b) The mean is equal to 10.

Step-by-step explanation:

The two-sided (or two-tailed) alternative hypothesis is:

b) The mean is equal to 10.

This is a two-sided alternative hypothesis because it includes the possibility that the mean could be either greater than or less than 10.

In a two-tailed test, the null hypothesis would state that the mean is equal to 10, and the alternative hypothesis would state that the mean is not equal to 10.