If two groups of numbers have the same mean, then
a.) their standard deviations must also be equal
b.) their medians must also be equal
c.) their modes must also be equal
d.) None of these alternative is correct
Answer: D
a.) their standard deviations must also be equal
b.) their medians must also be equal
c.) their modes must also be equal
d.) None of these alternative is correct
Answer: D
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