Question

Nexium is a drug that can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reflux. The manufacturer of Nexium claims that more than 94% of patients taking Nexium are healed within 8 weeks. In clinical trials, 213 of 224 patients suffering from acid reflux disease were healed after 8 weeks.

Use Minitab Express to test the manufacturer’s claim at the α = 0.01 level of significance. Report your answers to three decimal places, where applicable.

With a P-value of , we  (reject / fail to reject) the null hypothesis.  
The given data  (does / does not) provide significant evidence that the proportion of Nexium users who heal within 8 weeks is  (more than / less than / different from / equal to) 0.94.

Answer 1

The statistical software output for this problem is:

One sample proportion summary hypothesis test:
p : Proportion of successes
H₀ : p = 0.94
H_A : p > 0.94

Hypothesis test results:

Proportion	Count	Total	Sample Prop.	Std. Err.	Z-Stat	P-value
p	213	224	0.95089286	0.015867757	0.68647743	0.2462

Hence,

The answers will be:

With a P-value of , we  fail to reject the null hypothesis. The given data  does not provide significant evidence that the proportion of Nexium users who heal within 8 weeks is more than 0.94.