An experiment designed to compare two treatments against corrosion yielded the following data in pieces of wire subjected to the two treatments.

(The data represent the maximum depth of pits in units of one thousandth of an inch.)
The ordered values are 58.5, 59.4, 65.2∗, 66.2, 67.1∗, 68, 69.4∗, 72.1, 74∗, 78.2∗, 80.3∗
with an asterisk noting that the data value was from sample 1. Hence, the value of the test statistic is T = 3 + 5 + 7 + 9 + 10 + 11 = 45

Transcribed Image Text:

Treatment 1 65.2, 67.1, 69.4, 78.2, 74, 80.3 Treatment 2 59.4, 72.1, 68, 66.2, 58.5