Score: 0 of 1 pt 200130(24 complete) Hw Score: 49.17%, 14.75 of 30 pts 11.2.89 Q

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Score: 0 of 1 pt 200130(24 complete) Hw Score: 49.17%, 14.75 of 30 pts 11.2.89 Question Help * in a recent poll 1062 randomly selected adults were asked whether they approve of labor unions: 64% said yes. In 1896 about 67% of adults approved of labor Use the one-proportion z-test to perform the appropriate hypothesis test, after checking the conditions for the procedure What are the hypotheses for the one-proportion z-tes? o that the percentage of adults who approve of labor unions has decreased since 1936 Type integers or decimals.) SEX Sareen S 3 remaining 8 6

Explanation / Answer

H0: P = 0.67

H1: P < 0.67

The test statistic Z = (p - P)/sqrt(P * (1 - P)/n)

= (0.64 - 0.67)/sqrt(0.67 * (1 - 0.67)/1062)

= -2.079

At 5% significance level the critical value is z0.025 = -1.96

As the test statistic value is less than the critical value (-2.079 < -1.96), so the null hypothesis is rejected.

So at 5% significance level there is sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936.

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