A 23 factorial design on radar tracking was replicated 20 times with these results:
where y is the average acquisition .time (in seconds) and the number following the plus or minus sign is the calculated standard deviation of y. The variables were:
1. Modified (-) or standard (+) mode of operation
2. Short (-) or long (+) range
3. Slow (-) or fast (+) plane
Analyze the results. Do you think a transformation of the data should be made?