A Frequency Distribution Has a Mean of 200 and a Standard

question 83

Multiple Choice

A frequency distribution has a mean of 200 and a standard deviation of 20. The class limits for one class are 220 up to 240. What are the standard normal z-statistics for the class limits?

• A)−20 and 20
• B)−2.0 and −1.0
• C)200 and 220
• D)1.0 and 2.0

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