NAME:
HPER 3150
Descriptive Statistics Review
Complete the operations in order to determine the open box values.
8
*
2
10
=
/
/
+
2
2
*
5
=
/
4
+
5
/
1
=
=
=
=
What is the most stable measure of variability and WHY is this true?
What does the coefficient of variation tell you?
What does a V=.8 mean?
Use Table 3.4 and the following formulas to calculate the missing data, given M=700, S=100
Z 
Percentile
T  50  10 Z
X M
S
T score
P = 50 + Z percentile (+: add to 50, -: subtract from 50)
z score
Raw score
68
68
835
.57
Jonte scored 110 and Lee scored 105 on a test. The mean is 120 and the s is 10. What percentage of
people scored between Jonte and Lee?
Juan scored 120 on a test with a mean of 130 and a standard deviation of 15. Chiante obtained a T score of
43. Marlin had a z score of –0.39. Sarah achieved the 43rd percentile. Who had the best relative
performance?
Use the following information to answer these questions:
Given: mean = 200, s = 20, John's score = 210, and Allison's score = 225.
What percentage of people scored greater than or equal to Allison?
What are John's and Allison's T scores?
What percentage of people scored between John and Allison?