1. Quality control reports that are not available to consumers indicate that 20% of

Hot Shot ovens have faulty control panels. The owner of an apartment complex

has just purchased 120 of these ovens. Assume that the ovens purchased

constitute a random sample.

a. Can you use the normal approximation to the binomial distribution to estimate

the probability that between 22 and 35 of them have faulty control panels?

Explain.

b. Estimate the probability that between 22 and 35 of them (including 22 and 35)

have faulty control panels.

Any ideas?