Q7) Professor Oak wants to conduct an experiment to determine the healing effect

Question

Q7) Professor Oak wants to conduct an experiment to determine the healing effects of Potion X. 4000 pokemons from Singapore are randomly assigned to treatment or control group. (Interestingly, there are no fairy or dragon type pokemons in Singapore.) Professor Oak is against the use of placebo and blinding schemes as he thinks that friendship with pokemons must be built on trust. Which of the following statements is/are true:

(Assume that the pokemon types are mutually exclusive. i.e. no pokemon can be of more than one type)

(i) 2034 pokemons ended up being treated with Potion X, while 1966 pokemons from the control group received nothing at all indicates that random assignment wasn’t implemented correctly.

(ii) The proportion of fire type pokemons in both treatment and control groups should be almost the same.

(iii) Bias due to lack of a blinding can be managed by random assignment.

(iv) A positive association between the use of Potion X and healing is observed, this conclusion can be generalized for any fire type pokemons.

(v) Suppose Professor Oak lacks funding and can only sample 20 pokemons in Singapore instead. The proportion of water type pokemons in both treatment and control groups should be almost the same.

Explanation / Answer

Based on the question, the following statements would be true: -

(ii) The proportion of fire type pokemons in both treatment and control groups should be almost the same.

(iii) Bias due to lack of a blinding can be managed by random assignment.

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