Question

High school graduates:

$38,171 $27,959 $41,462 $33,903 $28,675 $29,031 $21,628 $34,531 $30,942 $21,660

$39,875 $16,947 $25,275 $31,258 $35,300 $34,165 $36,935 $46,513 $39,250 $37,772

$29,151 $28,299 $36,251 $22,637 $37,613 $30,732 $32,456 $32,786 $24,864 $28,935

(Population) Standard deviation = $600

College graduates:

$50,916 $66,597 $50,914 $46,745 $54,694 $56,222 $47,292 $60,338 $51,873 $48,000

$54,217 $54,984 $55,835 $62,192 $40,729 $46,206 $53,894 $60,627 $49,685 $49,147

$37,171 $42,463 $50,817 $46,409 $37,636 $64,954 $59,216 $62,925 $45,841 $55,588

(Population) Standard deviation = $700

Calculate the following confidence intervals.

90% confidence interval for the mean high school grad salary:

95% confidence interval for the mean high school grad salary:

99% confidence interval for the mean high school grad salary:

90% confidence interval for the mean college grad salary:

95% confidence interval for the mean college grad salary:

99% confidence interval for the mean college grad salary:

Answer 1