To demonstrate the way randomness works, I ran for you a little computer simulat

Question

To demonstrate the way randomness works, I ran for you a little computer simulation. I created a pretend problem in which there are 20 patients - 10 females and 10 males - who were to be randomized into two treatment groups of 10 patients each. I used the computer to perform this randomization. I reran the randomization 1000 times. For each randomization I counted the number of females in group 1. A summary of these 1000 randomizations is below: What is the ideal distribution of males and females to treatment groups? What percentage of the time was randomization successful in achieving the ideal situation? Why is it not always successful? If you were really concerned that the response might be related to gender, how would you improve the assignment of people to groups?

Explanation / Answer

a. 5 males & 5 females in each treatment group.

b. 33.1%

d. Take separate random samples of males and females.

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