True or False. Justify for full credit. (a) If the variance from a data set is zero, then all the observations in this data set must be identical. (b) The median of a normal distribution curve is always zero.
(a) If the variance from a data set is zero, then all the observations in this data set must be identical.
Ans : TRUE (by definition of variance)
b) The median of a normal distribution curve is always zero.
Ans : False (The median of a standard normal distribution is zero)
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