QuestionGood credit: The Fair Isaac Corporation (FICO) credit score is used by banks and other lenders to determine whether 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 lower than the cutoff of 720 . She finds that a random sample of 55 people had a mean FICO score of 685 with a standard deviation of 80 . Can the economist conclude that the mean FICO score is less than 720 ? Use the $\alpha=0.10$ level of significance and the $P$-value method with the TI-84 Plus calculator.
Part: $0 / 5$ $\square$
Part 1 of 5 (a) State the appropriate null and alternate hypotheses. $$\begin{array}{l} H_{0}: \square \\ H_{1}: \square \end{array}$$
This hypothesis test is a $\square$ (Choose one) test. $\square$ Skip Part Check Save For Later Submit Assignment