Practice Problems: Measures of Central Tendency
1. A high school teacher at a small private
school assigns trigonometry practice problems to be worked via the net.
Students must use a password to access the problems and the time of log-in and log-off
are automatically recorded for the teacher. At the end of the week, the teacher
examines the amount of time each student spent working the assigned problems.
The data is provided below in minutes.
Data
|
Array
|
15
|
49
|
28
|
48
|
25
|
43
|
48
|
39
|
22
|
34
|
43
|
33
|
49
|
28
|
34
|
27
|
22
|
25
|
33
|
25
|
27
|
22
|
25
|
22
|
22
|
22
|
20
|
20
|
39
|
15
|
2. Bailey has been playing golf on the weekends
for the past three years. Recently, she started keeping track of her recorded
scores. Her scores for June and July at her favorite 9-hole (par 36) golf
course are provided below.
Data
|
Array
|
45
|
56
|
49
|
49
|
42
|
45
|
56
|
42
|
41
|
42
|
36
|
41
|
34
|
41
|
38
|
41
|
41
|
41
|
40
|
40
|
42
|
40
|
41
|
39
|
39
|
39
|
38
|
38
|
40
|
38
|
39
|
36
|
36
|
36
|
41
|
34
|
3. Midterm exam scores for a small advanced
neuroanatomy class are provided below. Scores represent percent of items marked
correct on the exam.
Data
|
Array
|
87
|
99
|
99
|
94
|
75
|
93
|
87
|
88
|
94
|
87
|
75
|
87
|
35
|
87
|
88
|
75
|
87
|
75
|
93
|
35
|
4.
A group committed to quality television has been concerned about a new talk
show. For two weeks, they decide to count the number of words that must be
"bleeped" as too obscene for television and the number of physical
altercations. They hope that after recording this data that they will be able
to argue that the show is inappropriate for television particularly during the
day. The data for number of words censored is provided below.
Data
|
Array
|
342
|
349
|
267
|
342
|
321
|
321
|
157
|
289
|
33
|
267
|
254
|
254
|
166
|
166
|
132
|
157
|
289
|
132
|
349
|
33
|
