Examine the given statement then express the null hypothesis

Examine the given statement then express the null hypothesis H0 and the alternative hypothesis H1 in symbolic form. High school teachers have incomes with a standard deviation that is more than $21,250. Which of the following is the hypothesis test to be conducted?

Solution

High school teachers have incomes with a standard deviation thatis more than $21250.

Thu the correct null a alternative hypothesis will be:

A. H0:sigma=$21250

H1:sigma>$21250