1
QuizMultiple Choice

Representing Data — Unit test

Question 1 • AZ-Common Core Algebra II B

Dwayne and Alisha both correctly graphed a standard normal curve. Which of the following statements is true?

Answer
A
Neither the means nor the standard deviations of Dwayne’s and Alisha’s graphs must be the same.
B
The means of Dwayne’s and Alisha’s graphs must be the same but not the standard deviations.
C
The standard deviations of Dwayne’s and Alisha’s graphs must be the same but not the means.
D
Both the means and the standard deviations of Dwayne’s and Alisha’s graphs must be the same.

Explanation

A standard normal curve is specifically the normal distribution with mean 0 and standard deviation 1. Since Dwayne and Alisha both graphed a standard normal curve, both graphs must have the same mean and the same standard deviation. Therefore, the correct statement is that both must be the same.

AI-written and checked against the verified answer.

Next