Question

If value of x-bar is 70 and mu of sampling distribution is 15 with standard deviation is 20 then standard normal variable is?

Answer 1

Answer on Question #61292 – Math – Statistics and Probability

Question

If value of x-bar is 70 and mu of sampling distribution is 15 with standard deviation is 20, then standard normal variable is?

Solution

Z-score is

$$Z = \frac {\bar {x} - \mu_ {\bar {x}}}{\sigma_ {\bar {x}}} = \frac {7 0 - 1 5}{2 0} = 2. 7 5.$$

Answer: 2.75.

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