Question
is there a doctor in the house? A market research firm reported the mean annual earnings of all family
practitioners in the United States was $178,258 . A random sample of 47 family practitioners in Los Angeles had
mean earnings of x $192,890 with a standard deviation of $43,117 . Do the data provide sufficient evidence
to conclude that the mean salary for family practitioners in Los Angeles is greater than the national average? Use the
a 0.01 level of significance and the p-value method with the
Critical Values for the Student's t Distribution Table.
(a) State the appropriate null and alternate hypotheses.
(b) Compute the value of the test statistic.
(c) State a conclusion.
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Transcribed Image Text:is there a doctor in the house? A market research firm reported the mean annual earnings of all family practitioners in the United States was $178,258 . A random sample of 47 family practitioners in Los Angeles had mean earnings of x $192,890 with a standard deviation of $43,117 . Do the data provide sufficient evidence to conclude that the mean salary for family practitioners in Los Angeles is greater than the national average? Use the a 0.01 level of significance and the p-value method with the Critical Values for the Student's t Distribution Table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion.
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