a. To determine Explain the way to randomize the given experimental design. Explanation Given info: Researcher’s objective is to test the ability of a dowser. For this the researcher gets 20 identical containers and fill some containers with water and ask the dowser to find the location of the water filled containers. Justification: Answers may vary; one of the possible answers is given below: Experimental study : In a designed experimental study, researchers allocate individuals to a certain group under study and change the values of an explanatory variable intentionally, after which, the values of the response variable for each group is recorded. Here, all the 20 containers have to be divided into two groups. Each group is randomly assigned to one of two treatments. Where one treatment is filling the container with water and the other treatment is not filling the container with water. Now the dowser is asked to identify the container that is filled with water. There is an attempt to influence the subject as the value of explanatory variable is influenced and controlled by researcher under study. Hence, the given study is a designed experiment. Randomization: Randomization minimizes the difference between groups by equally distributing the individuals... b. To determine Explain whether the level of success of the dowser is statistically significant. c. To determine Find the number of correct identifications that has to be made by dowser to convince that forked-stick trick is better.

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Chapter 11, Problem 51E

To determine

Explain the way to randomize the given experimental design.

To determine

Explain whether the level of success of the dowser is statistically significant.

To determine

Find the number of correct identifications that has to be made by dowser to convince that forked-stick trick is better.

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