Data Analytics

Hypothesis Testing: NON-PARAMETRIC TESTS

Direction: Perform hypothesis testing. Show all the steps and solutions. Use SPSS for your solution.

1. Four brands of flashlight batteries are to be compared by testing each brand in five flashlights. Twenty flashlights are randomly selected and divided randomly into four groups of five flashlights each. Then each group of flashlights uses a different brand of battery. The lifetimes of the batteries, to the nearest hour, are as follows.

Brand A Brand B Brand C Brand D 42 28 24 20 30 36 36 32 39 31 28 38 29 32 28 28 29 27 33 25