Question: Which statement about the standard deviation s is false? a. s can never be negative. b. s can never be zero. c. For bell-shaped distributions,

Which statement about the standard deviation s is false?
a. s can never be negative.
b. s can never be zero.
c. For bell-shaped distributions, about 95% of the data fall within X̅ ± 2s.
d. s is a nonresistant (sensitive to outliers) measure of variability, as is the range.

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