Repeat Exercise 21, using the values at (75 %) relative humidity. Data From Exercise 21: Refer to
Question:
Repeat Exercise 21, using the values at \(75 \%\) relative humidity.
Data From Exercise 21:
Refer to the data set pit.csv. Consider depths of pits at all durations at 40% relative humidity. The question is whether the mean depth differs among the durations.
a. Construct an ANOVA table. You may give a range for the P-value.
b. Can you conclude that there are differences among the mean depths?
Pit Data Set:
In an experiment to measure corrosion in stainless steel, several pieces of stainless steel were exposed to salt particles for various lengths of time, at relative humidities of 40% and 75%. The exposure caused pits to form. After exposure, the depths of the pits were measured, and those greater than 10μm were reported. Each row of the data set represents one pit. Variables are the depth of the pit, the duration of exposure, and the relative humidity. Following is a list of the variables in this data set:
Transcribed Image Text:
Duration Humidity Depth Duration of exposure (in weeks) Humidity (in %) Depth of pit (in m)
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