Math 6
Probability and Statistics
A clerk recorded the number of pairs of jeans sold each day at
a store. The data are displayed on the stem-and-leaf plot.
Which of the following statements is true according to the
data in the stem-and-leaf plot?
A. The number of pairs of jeans sold each day was
between 0 and 8.
B. The stem-and-leaf plot displays 26 days of sales.
C. The median for the data is 25.
D. The mode for the data is 25.
28
29
30
18
19
fo
rt
. ..
27
17
20
od
e
26
16
m
25
15
fo
r..
.
24
14
n
23
13
Th
e
22
12
ed
ia
21
11
m
10
nd
-
9
Th
e
8
-a
7
m
6
st
e
5
Th
e
4
be
3
nu
m
2
Th
e
1
ro
f.
..
l..
.
25% 25% 25% 25%
What is missing from the box-andwhisker plot?
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
rti
l
t il
e
e
ng
e
16
17
18
qu
ar
7
25%
19
er
6
Lo
w
5
qu
a
4
25%
Up
pe
r
3
ed
ia
2
M
1
25%
Ra
Median
Range
Upper quartile
Lower quartile
n
A.
B.
C.
D.
25%
20
Look at the table. What is the range
for the times listed in the table?
25% 25% 25% 25%
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
18
19
in
in
17
12
m
4
10
m
3
9m
2
4m
1
in
4 min
9 min
10 min
12 min
in
A.
B.
C.
D.
20
Look at the table. The songs on Seth’s CD player play
randomly. What is the probability that the next song
played will be by the artist Sound Off ?
2
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
25%
18
19
25%
20
1/
7
1
25%
3/
24
25%
3/
12
1/12
3/12
3/24
1/7
1/
12
A.
B.
C.
D.
Which statement is false?
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
16
of
.. .
od
e
is
th
e
pi
ha
ec
e
ve
.. .
ve
.. .
ha
of
da
t
15
am
ay
aa
14
Th
em
8
of
da
t
7
se
t
6
A
5
se
t
4
A
3
se
t
2
A
1
am
ay
lw
ay
sh
as
..
25% 25% 25% 25%
of
da
t
A. A set of data always has a
mode.
B. A set of data may have
exactly one mode.
C. A set of data may have more
than one mode.
D. The mode is the piece of data
that occurs most frequently.
17
18
19
20
What is the median for this set of data?
{217, 243, 203, 206, 230, 195, 243}
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
25%
25%
13
15
17
19
14
16
18
24
3
2
25%
22
0
1
25%
21
7
206
217
220
243
20
6
A.
B.
C.
D.
20
Look at the table. According to the table,
what was the median number of
customers?
25% 25% 25% 25%
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
18
19
172
2
131
1
126
115
126
131
172
115
A.
B.
C.
D.
20
Which is most likely the range for the data
plotted in the box-and-whisker plot?
2
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
25%
18
25%
19
20
29
1
25%
21
25%
14
6
14
21
29
6
A.
B.
C.
D.
The data below lists the number of pages in each
book Harry read last summer. What is the median
of the data?
225, 157, 144, 312, 281, 276, 166
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
18
19
25%
20
31
2
2
25%
22
5
1
25%
22
3
168
223
225
312
16
8
A.
B.
C.
D.
25%
According to the table, what is the mean
number of students enrolled in a class?
25% 25% 25% 25%
7
10
11
50
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
18
19
20
50
3
11
2
7
1
10
A.
B.
C.
D.
If Mark randomly chooses 1 of these same-sized
pastries from the box, what is the probability that it
will have a cream cheese filling?
25% 25% 25% 25%
25%
30%
43%
60%
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
11
12
13
14
15
16
17
18
19
20
60
%
3
43
%
2
30
%
1
25
%
A.
B.
C.
D.