A Grouped Frequency Distribution Has a Mean of 200 and a Standard

question 111

Multiple Choice

A grouped 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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The process of forming conclusions based on observed evidence or experimented data rather than theory or pure logic.

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