Question

21 Suppose a researcher is interested in the effectiveness of a new drug that is intended to naturally increase hours of sleep for elderly patients experiencing insomnia. Suppose he collects information from a group of 64 patients, and calculates a o-.8 and a sample average of 6.4 hours of sleep. Is there sufficient evidence to reject the null hypothesis that his treatment is ineffective at increasing hours of sleep above 5 hours with 95% confidence? (hint: use one-sample z test, a=0.05)

Answer 1

There is sufficient evidence to reject the null hypothesis that his treatment is ineffective at increasing hours of sleep above 5 hours.

How to explain the hypothesis?

From the information given, the null hypothesis is n = 5 and the alternative hypothesis is that n > 5. The level of significance is given as 95%.

The test statistic will be:

= (6.4 - 5)(0.8/✓64)

= 14.

Since the z calculated more than the critical value, the null hypothesis will be rejected.

Learn more about sampling on:

brainly.com/question/17831271

#SPJ1