Solve the problem. Round results to the nearest hundredth.
-The mean of a set of data is -2.91 and its standard deviation is 3.88. Find the z score for a value of 2.80.
A) 1.62
B) 1.47
C) 1.77
D) 1.32

Question

Quizplus · Accepted Answer

To find the z-score, use the formula:

z = (x - mean) / standard deviation

Substituting the values given in the problem, we get:

z = (2.80 - (-2.91)) / 3.88
z ≈ 1.47

Rounding to the nearest hundredth, the answer is choice B).

Solve the Problem