St. Petersburg College | STA 2023 – ELEMENTARY STATISTICS | Module 3 Test Correct Answers |

St. Petersburg College | STA 2023 – ELEMENTARY
STATISTICS | Module 3 Test | 2025-2026
n1
Select the most appropriate response.

What is the term for the number of standard deviations an observation
falls from the mean?
Question options:

z score

discrete value

continuous value

y value
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Select the most appropriate response.

One normal curve has mean 23 and standard deviation 1, a second
normal curve has mean 5 and standard deviation 10. The curve that
represents data that is more dispersed, or spread out, is:
Question options:

the first normal curve

the second normal curve

they are equally spread out

there is insufficient information to answer the question
on

Determine the indicated interval.

For a normal curve with mean 8 and standard deviation 7, identify
which of the following intervals will define an area underneath the
curve of approximately 0.68
Question options:

, from 4.5 to 11.5

from 8 to 22

from 1 to 15

from –6 to 22
on

Select the most appropriate graph.

If X is a normal random variable with a mean of 20 and standard
deviation of 2, which of the following could be the graph of the
distribution of X?



Question options:

A.

B.

C.

D.
on

Find the indicated area.

Find the area of the indicated region under the standard normal curve.




Question options: