Fill in blank the right answer: I have five male students and four female studen

Question

Fill in blank the right answer:

I have five male students and four female students. I select three at random out of these nine students. I want to know the distribution of the number of female students selected. What is the distribution of this value? (Just give the name, or type of the distribution, e.g., uniform distribution)     (                             )

We are checking the effect of new way of doing a manual task. For that, we observe the workers and do time study. At that time, realizing they are watched, the workers became more diligent in the job. This is an example of (                  ) variable of an experimental study.

Explanation / Answer

Hypergeometric distribution: There are 9 students. After each selection, population changes. therefore, probability of success is not constant in each trial. we cannot use binomial distribution. since each trial is independent, n is finite and probability of success is not constant in each trial, we must use hypergeometric distribution.

Independent variable: This variable causes change in dependent variable, that is time.

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