The market firm salary.com reported that the mean annual earnings of all family practitioners in the US was $178,258. A random sample of 55 family practitioners in LA that month had mean earnings of...

The market firm salary.com reported that the mean annual earnings of all family practitioners in the US was $178,258. A random sample of 55 family practitioners in LA that month had mean earnings of mean=$192,340 with a standard deviation of $42,387. Does the data provide sufficient evidence to conclude that the mean salary for family practitioners is LA is greater than the national average?

A. state the null and alternate hypothesis

B. compute the value of the t statistic.

C. State your conclusion using 0.05 level of significance.