Question: Determine whether to reject Ho- (Choose one) the null hypothesis H. X Reject Do not rejectSAT scores: The College Board reports that in 2018 the

who took the test in 2019 had a mean score of 549.

Following is a dotplot of the 20 scores. 0 lOO 200 300

Determine whether to reject Ho- (Choose one) the null hypothesis H. X Reject Do not rejectSAT scores: The College Board reports that in 2018 the mean score on the math SAT was 527 and the population standard deviation was 6 :103. A random sample of 20 students who took the test in 2019 had a mean score of 549. Following is a dotplot of the 20 scores. 0 lOO 200 300 400 500 600 700 800 Part 4 of 5 (d) Determine whether to reject Ho- (Choose one) V the null hypothesis H. X Reject 5 Do not rejectGood 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 100 people had a mean FICO score of 710 with a standard deviation of 94. Can the economist conclude that the mean FICO score is less than 720? Use the (x : 0.05 level of significance and the Pvalue method with the TI84 Plus calculator. m

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