On a recent quiz, the class mean was 73 with a standard
deviation of 4. Calculate the z-score (to 4 decimal places) for a
person who received score of 87.
z-score:
Is this unusual?
Z score = (x-mu)/sigma =(87 - 73)/4 = 3.5
unusual.
for further any queries please comment and thank you.
On a recent quiz, the class mean was 73 with a standard deviation of 4. Calculate...