A sample of size 30 was taken from a very large population in order to estimate a proportion, p. The sample was found to have a proportion of p = 0.9. How many successes were found in this sample (hint: n•p)?

How many failures were found in this sample?

Can we use the apply the normal distribution to estimate p in this situation?
O Yes, the Z-normal distribution may be used.
O No, the Z-normal distribution may not be used.

Why or why not?
a. The population is not large enough for dependence
b. We have a large enough population for independence.
c. The number of successes or number of failures is less than 10.
d. The number of successes and number of failures is at least 10.
e. The sample size is at least 30.