The following MINITAB output presents the results of a hypothesis test for a population proportion p.

a. Is this a one-tailed or two-tailed test?

b. What is the null hypothesis?

c. Can H₀ be rejected at the 2% level? How can you tell?

d. Someone asks you whether the null hypothesis H₀ : p ?? 0.45 versus H₁ : p < 0.45 can be rejected at the 2% level. Can you answer without doing any calculations? How?

e. Use the output and an appropriate table to compute the P-value for the test of H₀ : p ?? 0.25 versus H₁ : p > 0.25.

f. Use the output and an appropriate table to compute a 90% confidence interval for p.

Transcribed Image Text:

Test and CI for One Proportion: X Test of p = 0.4 vs p < 0.4 %3D 95% Upper Bound Z-Value Variable X X 73 240 0.304167 0.353013 N Sample p P- Value 0.001 -3.03