A sample of 112 mortgages approved during the current yearshowed that 44 were issued to a single-earner family or individual.The historical percentage is 36 percent. At the .05 level ofsignificance in a right-tailed test, has the percentage ofsingle-earner or individual mortgages risen? (a-1) H0: ? ? .36versus H1: ? > .36. Choose the right option. a. Reject H0 ifzcalc > 1.645 b. Reject H0 if zcalc < 1.645 a b (a-2)Calculate the test statistic. (Round intermediate calculations to 2decimal places. Round your answer to 4 decimal places.) Teststatistic 1.645 (a-3) The null hypothesis should be rejected. TrueFalse (b) Is this a close decision? Yes No (c) State anyassumptions that are required. a. n? < 10 and n(1 ? ?) > 10b. n? < 10 and n(1 ? ?) < 10 c. n? > 10 and n(1 ? ?) >10 d. n? > 10 and n(1 ? ?) < 10 a b c d
