# Question

A federal study reported that 7.5% of the U.S. workforce has a drug problem. A drug enforcement official for the state of Indiana wished to investigate this statement. In her sample of 20 employed workers:

a. How many would you expect to have a drug problem? What is the standard deviation?

b. What is the likelihood that none of the workers sampled has a drug problem?

c. What is the likelihood at least one has a drug problem?

a. How many would you expect to have a drug problem? What is the standard deviation?

b. What is the likelihood that none of the workers sampled has a drug problem?

c. What is the likelihood at least one has a drug problem?

## Answer to relevant Questions

The Bank of Hawaii reports that 7% of its credit card holders will default at some time in their life. The Hilo branch just mailed out 12 new cards today.a. How many of these new cardholders would you expect to default? What ...A recent study conducted by Penn, Shone, and Borland, on behalf of LastMinute.com, revealed that 52% of business travelers plan their trips less than two weeks before departure. The study is to be replicated in the tri-state ...A study of the checkout lines at the Safeway Supermarket in the South Strand area revealed that between 4 and 7 p.m. on weekdays there is an average of four customers waiting in line. What is the probability that you visit ...Refer to the Baseball 2012 data. Compute the mean number of home runs per game. To do this, first find the mean number of home runs per team for 2012. Next, divide this value by 162 (a season comprises 162 games). Then ...A normal population has a mean of 20.0 and a standard deviation of 4.0.a. Compute the z value associated with 25.0.b. What proportion of the population is between 20.0 and 25.0?c. What proportion of the population is less ...Post your question

0