It is unlikely that we would observe a mean score of 150 on the reading comprehe

Question

It is unlikely that we would observe a mean score of 150 on the reading comprehension test by chance.
a. Think of at least one plausible explanation for why we might obtain a sample mean this low. (hint: to answer this question, think about potential flaws in a study design that would lead us to obtain a sample that's substantially different from the target population).

b. Suppose you learned that varsity the mean score in the population tend to follow a bimodal distribution. What is the most likely shape of the sampling distribution of the mean scores? (hint: Skewed distribution, Normal distribution, Uniform distribution or Bimodal distribution)

Explanation / Answer

a. This might be due to the fact that data has not been colleceted from proper samples covering the target population.

b. The most likely shape would be 'skewed distribution'. Normal distribution usually have one single mode]

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