We have given the number of successes and the sample size for a simple random sample from a population. In each case, do the following tasks. a. Determine the sample proportion. b. Decide whether...

We have given the number of successes and the sample size for a simple random sample from a population. In each case, do the following tasks.

a. Determine the sample proportion.

b. Decide whether using the one-proportion z-interval procedure is appropriate.

c. If appropriate, use the one-proportion z-interval procedure to find the confidence interval at the specified confidence level.

d. If appropriate, find the margin of error for the estimate of p and express the confidence interval in terms of the sample proportion and the margin of error.

x = 40, n = 50, 95% level