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Group Variation Due to Random Assignment Quick Check
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A scientist simulates chance outcomes by randomly re-sorting treatment groups one hundred times and constructing a distribution of the response variable means for each treatment group. What can the scientist predict about the means of the treatment group distributions?(1 point)

The means of the treatment group distributions will be exactly the same.

The means of the treatment group distributions will be very close to each other and close to the mean of the entire population.

The means of the treatment group distributions will be very different from the response variable mean of the entire population.

The means of the treatment group distributions will be very different.

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Answered by GPT-5 mini AI
The means of the treatment group distributions will be very close to each other and close to the mean of the entire population.

Reason: under random assignment, group means vary by chance around the overall mean, so their sampling distribution is centered at the population mean and differences are typically small.