A certain drug can be used to reduce the acid produced by the body and heal dama

Question

A certain drug can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reflux. The manufacturer of the drug claims that more than 93% of patients taking the drug are healed within 8 weeks. In clinical trials,216 to 229 patients suffering from acid reflux disease were healed after 8 weeks. Test the manufacturer's claim at alpha = 0.05 the level of significance.

What are the null and alternative hypotheses?

H0 versus H1

Determine the test statistic.

Zo =

Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice.

(Round to two decimal places as needed.)

Choose the correct conclusion below.

A. Reject the null hypothesis. There is insufficient evidence to conclude that more than 93% of patients taking the drug are healed within 8 weeks.

B.Do not reject the null hypothesis. There is sufficientis sufficient evidence to conclude more than 93% of patients taking the drug are healed within 8 weeks.

C.Do not reject the null hypothesis. There is insufficient evidence to conclude that more than 93% of patients taking the drug are healed within 8 weeks.

D.Reject the null hypothesis. There is sufficientis sufficient evidence to conclude that more than 93% of patients taking the drug are healed within 8 weeks.

Explanation / Answer

null hypothesis:Ho: p<=0.93

alternate hypothesis: p>0.93

for std error =(p(1-p)/n)1/2 =0.0169

phat=216/229 =0.9432

test stat Z=(phat-p)/std error =0.7848

crtitical value =1.645

C.Do not reject the null hypothesis. There is insufficient evidence to conclude that more than 93% of patients taking the drug are healed within 8 weeks.

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