Is there a doctor in the house A market research firm reported earnings of all family practitioners in the United States was 178 258 A random sample of 44 family practitioners in Los Angeles had mean earnings of x 193 250 with a standard deviation of 41 407 Do the data provide sufficient evidence to condude that the mean salary for family practitioners in Los Angeles differs from the national average Use the a 0 01 level of significance and the P value method with the TI 84 Plus calculator Part 1 of 5 a State the appropriate null and alternate hypotheses Ho 178 258 H 178 258 This hypothesis test is a two tailed Part 1 5 5 Part 2 of 5 b Compute the value of the test statistic Round the answer to two decimal places X Y test 5