A University Has 1,000 Computers Available for Students to Use

question 80

Essay

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. What is the probability that a sample mean is between 111 and 119 gigabytes?

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Definitions:

Square Seal

The seal in a disc brake caliper that seals each piston in the bore. The seal also acts as a return spring for the piston.

Dust Boot

In a disc brake caliper, an accordion-type seal that protects the outside of the piston and the piston bore from debris. In a drum brake wheel cylinder, two dust boots protect the pistons.

Fixed Caliper

A type of brake caliper that does not move relative to the brake rotor and uses multiple pistons on both sides for clamping action.

Steering Knuckle

A pivotal component in a vehicle's steering system that connects the wheel and tire to the suspension system, allowing for steering movement.