Concept explainers
To select the best answer from the given options.
Answer to Problem 11PT1
The option d) is correct.
Explanation of Solution
There are nine combinations of weight and gasoline. If we give some treatment first and then some other treatment, this will lead systematic error because randomization is not involved. In given different choices: Choices A, B and C introduce systematic errors − e.g. car warming up. D and E does not give an even spread of tests. Hence the best way to organize the study is:
There are nine combinations of weight and gasoline. Run the car several times using each of these combinations. Make all these runs in random order.
Thus, option (d) is correct.
Chapter 4 Solutions
The Practice of Statistics for AP - 4th Edition
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