Use the following information for questions:
The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds.
-What is the standardized score (z-score) for a boot-up time of x =20 seconds?
A) -2.0
B) 0.0
C) 1.0
D) 2.0

Question

Use the following information for questions:
 The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds.
-What is the standardized score (z-score) for a boot-up time of x =20 seconds?
A) -2.0
B) 0.0
C) 1.0
D) 2.0

Quizplus · Accepted Answer

The z-score is calculated using the formula: z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation. For x = 20, μ = 30, and σ = 5, the z-score is (20 - 30) / 5 = -2.0.

Use the Following Information for Questions