The formula for calculating the z-statistic is:a.(Sample mean - Population mean) / Sample standard deviationb.(Sample mean - Population mean) / Population standard deviationc.(Sample mean - Population mean) / Square root of sample sized.(Sample mean - Population mean) / Square root of population size
Question
The formula for calculating the z-statistic is:a.(Sample mean - Population mean) / Sample standard deviationb.(Sample mean - Population mean) / Population standard deviationc.(Sample mean - Population mean) / Square root of sample sized.(Sample mean - Population mean) / Square root of population size
Solution
The correct formula for calculating the z-statistic is:
c. (Sample mean - Population mean) / Square root of sample size
This formula is used in hypothesis testing and it helps to decide whether to reject the null hypothesis. It measures how many standard deviations an element is from the population mean.
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