# Question

A survey showed that the average commuter spends about 26 minutes on a one-way door-to-door trip from home to work. In addition, 5% of commuters reported a one-way commute of more than one hour (Bureau of Transportation Statistics website, January 12, 2004).

a. If 20 commuters are surveyed on a particular day, what is the probability that 3 will report a one-way commute of more than one hour?

b. If 20 commuters are surveyed on a particular day, what is the probability that none will report a one-way commute of more than one hour?

c. If a company has 2000 employees, what is the expected number of employees who have a one-way commute of more than one hour?

d. If a company has 2000 employees, what is the variance and standard deviation of the number of employees who have a one-way commute of more than one hour?

a. If 20 commuters are surveyed on a particular day, what is the probability that 3 will report a one-way commute of more than one hour?

b. If 20 commuters are surveyed on a particular day, what is the probability that none will report a one-way commute of more than one hour?

c. If a company has 2000 employees, what is the expected number of employees who have a one-way commute of more than one hour?

d. If a company has 2000 employees, what is the variance and standard deviation of the number of employees who have a one-way commute of more than one hour?

## Answer to relevant Questions

The following table shows the percentage of individuals in each age group who use an online tax program to prepare their federal income tax return (CompleteTax website, November 9, 2012). Online Tax Age ...In October 2012, Apple introduced a much smaller variant of the Apple iPad, known as the iPad Mini. Weighing less than 11 ounces, it is about 50% lighter than the standard iPad. Battery tests for the iPad Mini showed a mean ...Given that z is a standard normal random variable, find z for each situation.a. The area to the right of z is .01.b. The area to the right of z is .025.c. The area to the right of z is .05.d. The area to the right of z is ...Assume a binomial probability distribution has p = .60 and n = 200.a. What are the mean and standard deviation?b. Is this situation one in which binomial probabilities can be approximated by the normal probability ...Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process. Assume a production process produces items with a mean weight of 10 ounces. Calculate ...Post your question

0