# Question: Seventy eight percent of U S homes have a telephone answering device

Seventy-eight percent of U.S. homes have a telephone answering device. In a random sample of 250 homes, what is the probability that fewer than 50 do not have a telephone answering device?

**View Solution:**## Answer to relevant Questions

The mayor of a small town estimates that 35% of the residents in the town favor the construction of a municipal parking lot. If there are 350 people at a town meeting, find the probability that at least 100 favor ...Of all 3- to 5-year-old children, 56% are enrolled in school. If a sample of 500 such children is randomly selected, find the probability that at least 250 will be enrolled in school. For the first 7 months of the year, the average precipitation in Toledo, Ohio, is19.32 inches. If the average precipitation is normally distributed with a standard deviation of 2.44 inches, find these probabilities. a. A ...Using the standard normal distribution, find each probability. (6–1) a. P (0 < z < 2.07) b. P (–1.83 < z < 0) c. P (–1.59 < z < + 2.01) d. P (1.33 < z 1.66) g. P(z < – 2.03) h. P(z > –1.19) i. P(z < 1.93) j. ...In a recent study of 35 ninthgrade students, the mean number of hours per week that they played video games was 16.6. The standard deviation of the population was 2.8. a. Find the best point estimate of the mean. 16.6 ...Post your question