On a recent quiz, the class mean was 76 with a standard
deviation of 2.7. Calculate the z-score (to 2 decimal places) for a
person who received score of 82.
z score =
Is this unusual or not unusual?
given data
population mean
Population standard deviation
now have to calculate the Z score for
X=82
So from the formula of Z score
Since the value of Z lies between the range of the bell shape curve that is - 4 to 4 so it is not unusual value
On a recent quiz, the class mean was 76 with a standard deviation of 2.7. Calculate...
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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1479 and the standard deviation was 316. The test scores of four students selected at random are 1880, 1220, 2180, and 1380. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1880 is Round to two decimal places as needed.) The z-score for 1220 is (Round to two decimal places as needed) The...
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