Suppose a business person wishes to open a store in a local shopping

center only if there is strong evidence that the average number of people

in the center is at least 5000 per day. The null hypothesis will be 1

A. H0: 5000

B. H0: > 5000

C. H0: 5000

D. H0: < 5000

6. Which one of the followings will decrease width of a confidence interval?1

A. By increasing confidence level.

B. By increasing variability.

C. By increasing sample size.

D. By decreasing sample size.