The reason z scores may be used to calculate probabilities is that
A) frequencies are easily converted into probabilities
B) all z scores are independent of each other
C) all z scores are included within a standard deviation unit (plus or minus) of the mean
D) all z scores are included within 2 standard deviation units (plus or minus)

Question

Quizplus · Accepted Answer

Z scores are used to calculate probabilities because they convert individual scores into a standard form, allowing for the comparison of scores from different distributions. This conversion makes it easy to determine the probability of a score occurring within a given distribution by referencing the standard normal distribution table.

The Reason Z Scores May Be Used to Calculate Probabilities