Posted by **Shelby** on Sunday, October 27, 2013 at 9:30pm.

A university has 1,000 computers available for students to use. Each computer

has a 250-gigabyte hard drive. The university wants to estimate the space

occupied on the hard drives. A random sample of 100 computers showed a mean

of 115 gigabytes used with a standard deviation of 20 gigabytes.

-I'm not clear on how to calculate these answers and would appreciate help a great deal. Thank you!

a) What is the standard error of the mean?

b) What is the probability that a sample mean is greater than 200 gigabytes?

c) What is the probability that a sample mean is greater than 120 gigabytes?

d) What is the probability that a sample mean is between 111 and 119

gigabytes?

## Answer this Question

## Related Questions

- statistics - A university has 1000 computers available for students to use. Each...
- Computer - Your computer is running very slow. The LED light for the hard drive ...
- Statistics - 80. Florida State University has 14 statistics classes scheduled ...
- statistics - The starting salaries of a random sample of three students who ...
- math - CountingOutcomes and Theoretical Probability A computer store sells 4 ...
- ict - why does a computer need a floopy drive as well as a hard drive It doesn't...
- computer Science - 20 You are trying to boot your computer but your computer ...
- computer Science - 20 You are trying to boot your computer but your computer ...
- statistics - 2. The director of admissions at a large university advises ...
- English - 1. You should study hard to get into university. 2. You should study ...