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Due
10/15 - 7 points
Complete the following problems.
Show all work.
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 are
provided below in minutes.
15
28
25
48
22
43
49
34
22
33
27
25
22
20
39
- Find the Mean, Median,
and Mode for the above data.
- draw a frequency polygon
for these data.
- What does this frequency
distribution and central tendency data tell you about students' length
of time on the computer solving trigonometry problems?
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.
45
49
42
56
41
36
34
38
41
40
42
41
39
38
40
39
36
41
- Find the Mean, Median,
and Mode for the above data.
- draw a frequency polygon
for these data.
- What does this frequency
distribution and central tendency data tell you about Bailey's golf
game?
3) Midterm exam scores for
a small advanced anatomy class are provided below. Scores represent
percent of items marked correct on the exam.
87
99
75
87
94
75
35
88
87
93
- Find the Mean, Median,
and Mode for the above data.
- draw a frequency polygon
for these data.
- What does this frequency
distribution and central tendency data tell you about students'
performance on the midterm (the traditional grading scale is used)?
4) A psychologist is
studying children's aggression in different play areas. She trains
observers to rate children's aggression on a scale from 1 (low) to 10
(high), then has them observe preschool children randomly assigned to play
in either the art or block play areas of the classroom. She obtains the
following results:
Art area (n=6)
Block area (n=6)
1
6
4
5
4
3
4
5
2
6
3
5
- Find the Mean, Median,
and Mode for each group.
- Use a bar graph to graph
the group means. How is this graph different from a frequency polygon?
- Compute the variance and
the standard deviation for the above groups. What do these statistics
tell you about the data?
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