Question

The following list contains the number of hours that a sample of
9
middle-school students spent watching television last week.
19
,
15
,
8
,
9
,
16
,
7
,
20
,
18
,
15
Find the median number of hours for that sample.
hours

Answer 1

A group of
10
students from the same middle school have been asked to record how much time they spent this morning traveling from home to school. Here are the results (in minutes).
16
,
12
,
8
,
7
,
4
,
7
,
13
,
5
,
14
,
5
Find the median travel time for that group of students.
minutes

Answer 2

Here are the weights (in pounds) of a sample of
13
male eleventh graders.
162
,
149
,
145
,
155
,
172
,
170
,
148
,
168
,
142
,
145
,
144
,
162
,
143
Find the median weight of these students.
pounds

Answer 3

First, we need to arrange the numbers in ascending order: 7, 8, 9, 15, 15, 16, 18, 19, 20.

Since there are an odd number of values (9), the median will be the middle value.

The middle value is the 5th value, which is 15.

Therefore, the median number of hours for that sample is 15 hours.

Answer 4

First, we need to arrange the numbers in ascending order: 4, 5, 5, 7, 7, 8, 12, 13, 14, 16.

Since there are an even number of values (10), the median will be the average of the middle two values.

The middle two values are the 5th and 6th values, which are 7 and 8.

Therefore, the median travel time for that group of students is (7 + 8) / 2 = 7.5 minutes.

Answer 5

First, we need to arrange the numbers in ascending order: 142, 143, 144, 145, 145, 148, 149, 155, 162, 162, 168, 170, 172.

Since there are an odd number of values (13), the median will be the middle value.

The middle value is the 7th value, which is 149.

Therefore, the median weight of these students is 149 pounds.