Determine if the following statements are true or false.a) The standard deviation of a data set has

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

Determine if the following statements are true or false.

a) The standard deviation of a data set has the same units as those of the data values of

the data set.

 

b) The variance is an actual average

c) If the z-score of a data value is negative, then the data value is larger than the mean of

the underlying data set

d) The minimum percentage of data values in a data set that z-scores with |z| < 4 is 89%

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