# Question: The average U S monthly cable bill in 2012 has

The average U. S. monthly cable bill in 2012 has been reported to be $ 86. Assume monthly cable bills follow a normal distribution with a standard deviation of $ 9.50.

a. What is the probability that a randomly selected bill will be

1. Less than $ 80?

2. Less than $ 90?

3. Exactly $ 85?

4. Between $ 75 and $ 95?

b. Use Excel or PHStat to confirm the answers in part a.

c. Which monthly cable bill represents the 75th percentile?

a. What is the probability that a randomly selected bill will be

1. Less than $ 80?

2. Less than $ 90?

3. Exactly $ 85?

4. Between $ 75 and $ 95?

b. Use Excel or PHStat to confirm the answers in part a.

c. Which monthly cable bill represents the 75th percentile?

## Relevant Questions

Assume that the number of miles a particular brand of tire lasts before it needs to be replaced follows a normal distribution with a mean of 45,600 miles and a standard deviation of 5,800 miles. a. What is the probability ...TomTom, the producer of GPS devices, reported that the fastest drivers in the nation are in Mississippi. In Mississippi, interstate drivers average 70.1 miles per hour. Assume that the speed of cars traveling on ...A binomial distribution has p = 0.60 and n = 40. a. What are the mean and standard deviation for this distribution? b. What is the probability of exactly 27 successes? c. What is the probability of less than 30 successes? ...Much of the NCAA menâ€™s basketball tournament, otherwise known as March Madness, takes place during the workweek. According to CouponCabin.com, 34% of employed adults who plan to watch at least one game plan to watch ...Suppose a number of months before your car battery needs to be replaced follow the exponential distribution with a mean of 50.0 months. a. What is the probability that your car battery will need to be replaced within 24 ...Post your question