A continuous random variable x is normally distributed with a mean of 100 km and a standard deviation of 20 km. Given that x = 120, its corresponding z-score is -1.0.

Name: A continuous random variable x is normally distributed with a mean of 100 km and a standard deviation of 20 km. Given that x = 120, its corresponding z-score is -1.0.
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Question

Quizplus · Accepted Answer

The z-score is calculated as (x - mean) / standard deviation, which is (120 - 100) / 20 = 1.0, not -1.0.

A Continuous Random Variable X Is Normally Distributed with a Mean