Homework Help: statistics

Posted by nounou on Friday, July 16, 2010 at 4:48pm.

The time it takes to give a man a shampoo and haircut is normally distributed with a mean of 22 minutes and standard deviation of 3 minutes. Customers are scheduled every 30 minutes. (a) What is the probability that a male customer will take longer than the allocated time? *(b) If three customers are scheduled sequentially on the half hour, what is the probability that all three will be finished withintheir allocated half-hours time?

statistics - bobpursley, Friday, July 16, 2010 at 6:59pm
http://davidmlane.com/hyperstat/z_table.html

set your mean and standard deviation on the graph, then calculate the area below 30, that is the probability of getting a customer done. Cube it for three customers sequentially.

Answer this Question

Related Questions

statistics - Suppose the amount of time it takes for statistics students to ...
Statistics - Suppose an automobile association reports that the average time it ...
Stats - Suppose the time it takes for a purchasing agent to complete an online ...
stats - The time it takes to run a road race is normally distributed with a mean...
Statistics - A hospital claims that the mean waiting time at its emergency room...
statistics - Times for a surgical procedure are normally distributed. Method A ...
statistics - The MacBurger restaurant chain claims that the waiting time of ...
statistics - The times taken to complete a statistics test by all students are ...
statistics - The times taken to complete a statistics test by all students are ...
Statistics...help - An article claimed that the typical supermarket trip takes a...

For Further Reading

First Name:
School Subject:
Answer: