The Educational Resource Service publishes information about wages and salaries in the public schools system in National Survey of Salaries and Wages in Public Schools. The mean annual salary of (public) classroom teachers is $49.0 thousand. A hypothesis test is to be performed to decide whether the mean annual salary of classroom teachers in Hawaii is greater than the national mean.
a. Determine the null hypothesis.
b. Determine the alternative hypothesis.
c. Classify the hypothesis test as two tailed, left tailed, or right tailed.