Researchers were interested in the relationship between farmers' approach
to their cows and the cows' milk yield. After surveying a random sample of
120 farmers, the researchers found that on farms where cows were called
by name, milk yield was 258 liters higher on average than on farms where
this was not the case.
Can we conclude that calling the cows by name caused the cows to
produce more milk? Why?
Choose 1 answer:
Yes, because the sample size was large
Yes, because the farmers were randomly selected
Yes, because the cows were randomly assigned
Not necessarily, because the sample size was too small
E
Not necessarily, because this wasn't an experiment
O
0
0
о
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