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True or False. Justify for full credit. (a) If the variance from a data set is...

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.

Math   Statistics-And-Probability   
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Answer #1

(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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