Biometric Security In considering the use of biometric security (such as fingerprints) to replace passwords, you want to estimate the percentage of adults who believe that passwords should be replaced with biometric security. How many randomly selected adults must you survey?

Assume that you want to be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.

a. Assume that nothing is known about the percentage of adults who believe that passwords should be replaced with biometric security.

b. Assume that a prior survey suggests that about 53% of adults believe that biometric security should replace passwords (based on a USA Today report).

c. Does the additional survey information from part

(b) have much of an effect on the sample size that is required?