Save Homework: HW 9 Score: 0 of 1 pt 12.2.89-P HY Score: 44.29%, 4.43 of 10 pts

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Save Homework: HW 9 Score: 0 of 1 pt 12.2.89-P HY Score: 44.29%, 4.43 of 10 pts Question Help * of labor unions; 58% saidyos. In 1936, about 63% of adults approved of labor unions. 80f 10 (7 complete) ln a recent poll10 2 randomiy selected adults were asked whether they approve At the 5% significance level do e data p de su cien evidence to conclude that the percentage of adults who approve of labor un ons has deceased s 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-test? Type intogers or decimals.) cor Enter your answer in the edit fields and then click Check Answer parts Clear All Check Anawer

Explanation / Answer

here hypothesis Ho: p=0.63 ; Ha: p<0.63

here for 0.05 level; critical value z =-1.2816

rejection region: reject Ho: if z<-1.2816

std error =(p(!-p)/n)1/2 =0.0148

hence test statistic z =(phat-p)/std error =(0.58-0.63)/0.0148 =-3.375

as test statistic is in critical region ; we reject null hypothesis.

we can conclude that percentage of adults who approve of labour unions has decreased since 1936.

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