(b) Compute the value of the test statistic. Round the answer to at least three decimal places.
(b) Compute the value of the test statistic. Round the answer to at least three decimal places.
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
Transcribed Image Text:(b) Compute the value of the test statistic. Round the answer to at least three decimal places.

Transcribed Image Text:Good creait: Tne rair isaac Corporation (FICO) creait score is used py oanks ana orner ienaers to aetermine wnetner someone is
a good credit risk. Scores range from 300 to 850, with a score of 720 or more indicating that a person is a very good credit risk.
An economist wants to determine whether the mean FICO score is more than the cutoff of 720. She finds that a random sample of
50 people had a mean FICO score of 765 with a standard deviation of 98. Can the economist conclude that the mean FICO score
is greater than 720? Use the a =0.01 level of significance and the critical value method.
Part 1 of 5
(a) State the appropriate null and alternate hypotheses.
Η : μ-720
H,: p > 720
This hypothesis test is a right-tailed
test.
Part: 1/5
Part 2 of 5
Find the critical value(s). Round the answer(s) to at least three decimal places. If there is more than one critical value,
separate them with commas.
O 国G@
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