i. A z-score is the distance between a selected value (X) and the population mean (μ) divided by the population standard deviation (σ).
Ii) The standard normal distribution is a special normal distribution with a mean of 0 and a standard deviation of 1.
Iii) A computed z for X values to the right of the mean is negative.
A) (i), (ii) and (iii) are all correct statements
B) (i) is a correct statement but not (ii) or (iii).
C) (i) and, (iii) are correct statements but not (ii).
D) (i) and, (ii) are correct statements but not (iii).
E) All statements are false

Question

Quizplus · Accepted Answer

Statements (i) and (ii) are correct. Statement (iii) is incorrect because a computed z for X values to the right of the mean is positive, not negative.

I a Z-Score Is the Distance Between a Selected Value