# Question

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 Mississippi’s interstates follows the normal distribution with a standard deviation of 7.2 miles per hour.

a. What is the probability that a randomly selected car on a Mississippi interstate is traveling

1. faster than 65 miles per hour?

2. slower than 72 miles per hour?

3. between 60 and 66 miles per hour?

4. between 78 and 85 miles per hour?

b. Confirm the answers to part a with Excel or PHStat.

c. What average speed should I drive if I want to travel faster than 70% of the cars on the interstate?

a. What is the probability that a randomly selected car on a Mississippi interstate is traveling

1. faster than 65 miles per hour?

2. slower than 72 miles per hour?

3. between 60 and 66 miles per hour?

4. between 78 and 85 miles per hour?

b. Confirm the answers to part a with Excel or PHStat.

c. What average speed should I drive if I want to travel faster than 70% of the cars on the interstate?

## Answer to relevant Questions

According to the Organisation for Economic Co operation and Development (OECD), South Koreans worked an average of 2,090 hours per year in 2011 (compared with 1,787 for workers in the United States). Assume this random ...Pew Research Center surveyed adults that were 18– 64 years old and had their own children under age 18 living in their household in 2011 on the amount of time spent on various activities. The results indicated that moms ...A process produces strings of Christmas tree lights that historically have experienced a defective rate of 4%. A customer has placed an order for 150 strings of lights. Use the normal approximation to the binomial ...A busy intersection in the state of Delaware averages a traffic accident every 32 days. Assume the time between accidents follows an exponential distribution. a. What is the probability that the next accident will occur ...While waiting for an order to arrive from its supplier (known as the lead time), the golf department manager at a local Dick’s Sporting Goods store will sell an average of 60 boxes of Titleist golf balls. Assume the demand ...Post your question

0