The average yearly rainfall in the sahara desert used to be 10 inches. a climatologist believes that amount has changed. which represent the null and alternative hypothesis?

A null hypothesis states that the population parameter should be equal to the value that was hypothesized. So in this case the null hypothesis (H₀) would be equal (=) to 10.

H₀=10

This indicates that there was no change.

An alternative hypothesis, on the other hand, would indicate that there is a change. So the alternative hypothesis (Ha) should either be greater, smaller or in short, not equal to the hypothesized value.

Ha is not equal to 10

This would indicate there was a change.