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Mathematics, 13.12.2019 20:31 ayoismeisjuam
Asample of 114 mortgages approved during the current year showed that 36 were issued to a single-earner family or individual. the historical percentage is 28 percent. at the .05 level of significance in a right-tailed test, has the percentage of single-earner or individual mortgages risen?
(a-1) h0: π ≤ .28 versus h1: π > .28. choose the right option. reject h0 if zcalc > 1.645 reject h0 if zcalc < 1.645 a b
(a-2) calculate the test statistic. (round intermediate calculations to 2 decimal places. round your answer to 4 decimal places.) test statistic
(a-3) the null hypothesis should be rejected.
i. true
ii. false
(b) is this a close decision?
i. yes
ii. no
(c) state any assumptions that are required.
i. n π < 10 and n(1 − π ) > 10
ii. n π < 10 and n(1 − π ) < 10
iii. n π > 10 and n(1 − π ) > 10
iv. n π > 10 and n(1 − π ) < 10
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