Change the specs. Refer to the previous exercise. For each of the following variations on the design specifications, state whether the required sample size will be higher, lower, or the same as that found above.

(a) Use a 99% confidence interval.

(b) Change the allowable margin of error to 0.01.

(c) Use a planning value of p∗ = 0.15.

(d) Use a different company to do the income verification.