CHAPTER 3 ASSIGNMENT
Part 1:
Circle the most accurate answer for each of the following:
1.
1.
If the mean of a set of data is 23.00, and 12.60 has a zscore of –1.30, then the standard
deviation must be:
A)
4.00
B)
32.00
C)
64.00
D)
8.00
2.
3.
Find the z score for each student and indicate which one is higher.
Art Major
X
=
46
X
=
50
s
=
5
Theater Major
X
=
70
X
=
75
s
=
7
A)
Both students have the same score.
B)
Neither student received a positive score
;
therefore
,
the higher score cannot be
determined.
C)
The theater major has a higher score than the art major
.
D)
The art major has a higher score than the theater major.
3.
7.
If the mean of a set of data is 23.00, and 30.50 has a zscore of 0.75, then the standard
deviation must be:
A)
100.00
B)
5.00
C)
50.00
D)
10.00
4.
8.
If the five number summary for a set of data is 0, 3, 6, 7, and 16, then the mean of this
set of data is
A)
6
B)
there is insufficient information to calculate the mean
C)
8
D)
5
5.
9.
Find
Q
1
,
Q
2
, and
Q
3
for the following data set.
7, 21, 32, 38.
A)
Q
1
5
=
,
Q
2
20
=
, and
Q
3
39
=
C)
Q
1
14
=
,
Q
2
25
=
, and
Q
3
25
=
B)
Q
1
14
=
,
Q
2
265
=
.
, and
Q
3
35
=
D)
Q
1
10
=
,
Q
2
25
=
, and
Q
3
36
=
6.
1
All the values in a dataset are between 9 and 11, except for one value of 84.
That value
84 is likely to be
A)
the boxplot
B)
the mean
C)
the range
D)
an outlier
7.
The monthly salaries of a sample of 100 employees ranged from the lowest salary of 1040
DHS to the highest salary of 1720 DHS.
If we want to organize the data into seven classes,
what is the most convenient class interval?
A.
50
B.
100
C.
150
D.
200
8.
For which measure of central tendency, will the sum of the deviations of each value from the
data's average will always be zero?
A.
Mode
B.
Mean
C.
Median
D.
None of the above
9.
Which measures of central location are not affected by extremely small or extremely large
values?
A.
Mean and median
B.
Mean and mode
C.
Mode and median
D.
None of the above
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0.
1
In a unimodal, symmetrical distribution as shown in the figure below.
A)
The median and the mode are the same, but the mean can be different.
B)
The mean is the same as the median, but the mode can be different.
C)
The mean, the median, and the mode are different.
D)
The mean, the median, and the mode are the same
.
1
1.
15
If a set of 25 numbers has standard deviation 9, then it's variance is
A)
45.00
B)
16.20
C)
81.00
D)
1.80
12
.
20
What is the term for a characteristic or measure obtained by using all the data values for
a specific population?
A)
mode
B)
statistic
C)
parameter
D)
variable
1
3.
4
A normal distribution in which approximately 68% of the data values fall within one
standard deviation of the mean behaves according to
A)
the empirical rule.
C)
a boxplot.
B)
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 Spring '12
 johnanderson
 Statistics, Standard Deviation, Mean

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