Which example would be likely to give a valid conclusion?

Five people are randomly sampled and asked about their eye color.

Sarah asks the girls on her soccer team what their favorite sport is.

In a data set of 20 data points, the mean and median are different and there is no mode.

Ten students from each class are randomly sampled to find the favorite subject at school.

Question

Which example would be likely to give a valid conclusion?

Five people are randomly sampled and asked about their eye color.

Sarah asks the girls on her soccer team what their favorite sport is.

In a data set of 20 data points, the mean and median are different and there is no mode.

Ten students from each class are randomly sampled to find the favorite subject at school.

anonymous · Answer

I think its the 1st one but not sure

p0sitr0n · Answer

yep first one seems good

p0sitr0n · Answer

since the rest either do not have enough choices (the school might not offer all classes, they might be biased, we cannot check if the person is lying), or the sampling is not random (choosing only girls in #2)

anonymous · Answer

Sounds about right. agreed with P0Sit

perl · Answer

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