Question: Records indicate that 60% of the residents of a large city have cable TV. If we select 20 residents at random,

a. Use the binomial to find the probability that 6 or more will not have cable.

b. Use the normal approximation to the binomial to find the probability that 6 or more will not have cable.

c. Compare the answers to a and b above. Does the normal distribution appear to give a “good” approximation? Should it in this problem? Explain why or why not.