Because sample means were being tested, the ___ is used to calculate the z-score
2 answers:
Formula to calculate Z score

Where, a=Population mean
b=Sample Mean
c=Standard Deviation of the sample
Because sample means were being tested, "The Sample Standard Deviation and Population Mean" is used to calculate the z-score
<span>Because sample means were being tested, the bell curve is used to calculate the z-score</span>
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