At one college, gpa's have a distribution that is unimodal and symmetric with a mean of 2.9 and a standard deviation of 0.6. what is the range of gpa's from one standard deviation below the mean to one standard deviation above the mean?

a) 2.3 to 2.9
b) 2.9 to 3.5
c) 0.6 to 3.5
d) 2.3 to 3.5

d) 2.3 to 3.5

Step-by-step explanation:

In this problem, we have that:

The mean is 2.9

The standard deviation is 0.6

One standard deviation below the mean

This is the mean subtracted by one standard deviation.

So this is 2.9 - 0.6 = 2.3

One standard deviation above the mean

This is one standard deviation added to the mean.

So this is 2.9 + 0.6 = 3.5

So the correct answer is:

d) 2.3 to 3.5

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.