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Battery life in hour of a factorial experiment with 2 factors and 3 levels each. Factors are:
battery
A data frame with 36 rows and 6 columns
Temperature: of the battery during the discharge experiment
Temperature
Material: Plate material for the battery
Material
Other columns are:
StandardOrder: Yate's standard order
StandardOrder
RunOrder: randomized order, in which tests have been executed
RunOrder
Repeat: repeat number
Repeat
Response: battery life in hours
Response
Douglas C. Montgomery, "Design and Analysis of Experiments", 8th edition, Wiley, 2019