Nallari Algebra 1 Class
Name ______________________________________ Date ________________
Statistics: Variance, Standard Deviation, Mean Absolute Deviation, Z-Scores Quiz
C) Calculate the standard deviation. Round
the answer to the nearest whole number.
D) Go back to question A. Mark on the graph
one standard deviation above and below the
mean.
E) What is the z-score of the element 499?
Round to the nearest hundredth.
1)
Passing SOL scores of students:
402, 412, 416, 420, 427, 435, 439, 443, 447,
456, 461, 466, 472, 478, 484, 499, 508, 532,
549, 578
A) On the number line, list the mean of the
data. Round the answer to the nearest whole
number.
F) How many elements have a z-score of
greater than -1 ?
2)
The data set shown has a mean of 45 and a
standard deviation of 14.5, rounded to the
nearest tenth.
{22, 27, 33, 39, 42, 45, 54, 59, 62, 67}
How many of these data points have a z-score
less than –0.1 ?
B) Calculate the mean absolute deviation.
A
B
C
D
2
3
4
5
3)
A data set has a mean of 32.25 and a standard
deviation of 5.21 An element in this set is 62.
What is the z-score for 62? Round the answer
to the nearest hundredth.
5)
This table shows data on the fundraiser monies
collected by four different classes and one
student from each class.
Bethany
4)
Money Collected
Mean for
Standard
Student’s
Class
Deviation
z-score
for Class
88
10
0.5
Steven
91
8
0.7
Jamie
94
7
1.2
Claire
89
14
0.35
Which of the four students raised the most
money?
6)
This line plot shows the ages of all of the
people who live in Rivercrest Apartments.
The mean amount of players for these
basketball players is 45 players.
The standard deviation of the data is 20.5
players.
On the histogram, shade in each interval that
may have data points within 0.5 standard
deviations of the mean.
Mean = 44 Standard Deviation = 7
How many elements are above the mean?
How many elements are below the mean?
How many elements fall within one standard
deviation of the mean?
How many standard deviations from the mean
is the age of 35? Round to the nearest tenth.