If your test statistic to is between -ta/2 and ta/2 you do not reject Ho ep 5: State the conclusion in term of the problem. M9.2: Hypothesis Testing HT : 0 Unknown Hypothesis Test for the Pop. Mean (o Unknown) By-Hand: Show all relevant notation, math / Excel formulas, step-by-step conditions and calculations. Remember to check Canvas videos/ attend class to get missing numbers. Exercise: As lending standards tightened after the Great Recession, there is some concern that the average credit score of a borrower with a mortgage owned by Fannie Mae (i.e., the gov't) has decreased from its prior average of 771. A random sample of 30 mortgages recently revealed an average credit score of _16 7 with a sample standard deviation of 15 Conduct a hypothesis test with a = _. Show Work: Step 1: Identify the null and alternative hypotheses Step 2: Set a value for the significance level, a. 153