For a normally distributed set of scores with what is the probability of a score being equal to or greater than 200? $$\mu = 200 \text { and } \sigma = 20$$
A).3413
B).5000
C).6826
D).9544

Question

Quizplus · Accepted Answer

Since the set of scores is normally distributed, we can use the standard normal distribution to find the probability of a score being equal to or greater than 200. We first convert 200 into a z-score:
$$z = \frac{200-200}{20} = 0$$
The probability of a z-score being equal to or greater than 0 is 0.5. Therefore, the probability of a score being equal to or greater than 200 is 0.5 or 50%, which is represented by choice B.

For a Normally Distributed Set of Scores with What Is μ=200 and σ=20\mu = 200 \text { and } \sigma = 20μ=200 and σ=20

For a Normally Distributed Set of Scores with What Is $\mu = 200 \text { and } \sigma = 20$