Cut 5 pieces of string having the following lengths ininches.

2.99.55.74.27.6

A subject measures the first length four times by eye. His measurementsare

3.02.93.13.0

Suppose his measurements have a bias of +0.1inches.

What are the four random errors for hismeasurements?

(Give your answers to one decimal place ifnecessary.)

random error1:

random error2:

random error3:

random error4:

What is the variance of his fourmeasurements?

(Give your answer to four decimalplaces.)

variance: