Fiber strength data

A quality engineer at a textile manufacturer wants to determine the factors that affect the breaking strength of a synthetic fiber. The engineer samples the output of four production machines and three operators selected at random.

You can use this data to demonstrate Line Plot, With Symbols.

Worksheet column Description
Machine The machine on which the sample was produced: 1, 2, 3, or 4
Operator The operator of the machine: 1, 2, or 3
Strength The breaking strength of the fiber sample
Temp The temperature at which the sample was produced