Download Extra Credit for Exam #1 - El Camino College Compton Center

Math 150
Extra Credit Assignment #1
Instructions and Guidelines: This extra credit assignment is designed to help you understand basic descriptive statistics
concepts. It may add 8% to your Exam #1 score. The assignment is divided in two sections.
Section I
Section II
Total
Questions 1-7
Question 8
4%
4%
8%
You may complete only one or both sections. In order to get credit for the assignment, the assignment must be typed
using Excel or Word and the graphs and charts must be displayed using Excel or Word. If you need help typing the
assignment please go to the Student Success Center computer lab. You may call the students success center at (310) 9001600 Ext. 2535. You may also visit the instructor for assistance with the assignment during office hours. If you earn
100% in Exam #1 you will not receive credit for the assignment because you can’t get over 100% in the exam. There
will be other extra credit opportunities in the semester.
-------------------------------------------------------------------------------------------------------------------------------------------------------------1) Suppose you work for the American Lung Association. The American Lung Association wants to know the
average number of El Camino College students who smoke Tabaco. How can you accomplish the task of finding
the average number of students at El Camino College who smoke tobacco? Describe the data collection process
that you would use. Explain why you would use this collection process. If you had enough money and time
what method would you use? Write at least one paragraph to explain your ideas.
2) The following are ten exam scores of 40, 50, 56, 60, 78, 68, 86, 79, 83, 90 for ten students in a statistics class. Find
the mean, standard deviation, range.
3) Suppose the instructor adds 10 points extra to each exam score. Find the new exam scores and find the mean,
standard deviation and range for the new scores.
Original Score
New Score
40
50
56
60
78
68
86
79
83
90
4) Suppose the instructor subtracts 5 points for each student. Find the new exam scores and find the mean, standard
deviation and range for the new scores.
Original Score
New Score
40
50
56
60
78
68
86
79
83
90
1
5) Suppose the instructor multiplies the original scores times 3 for each student. Find the new exam scores and find
the mean, standard deviation and range for the new scores.
Original Score New Score
40
50
56
60
78
68
86
79
83
90
6) Suppose the instructor divides the original score times by 2 for each original score. Find the new exam scores and
find the mean, standard deviation and range for the new scores.
Original Score New Score
40
50
56
60
78
68
86
79
83
90
7) The following data represents the monthly number of arrest made for the year 2005 by the Miami-Dade Police
Department. Create a time series using Word or Microsoft Excel.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
751
650
909
881
919
800
834
789
802
636
579
777
2
8) The height of 30 college students is shown below.
64
67
65
67
68
63
65
62
70
64
64
65
67
70
72
63
68
68
62
72
70
69
67
67
71
60
65
67
64
69
A) Find the Mean, Median, Mode, Standard Deviation and range of the students’ heights.
B) Find the five-number summary and use it to construct a box-and-whisker plot of the students’ heights using Microsoft
Word or Excel.
C) Construct a frequency distribution using Microsoft Word or Excel. Use 6 classes, a class width of 2 inches, and start at
the minimum.
D) Find the cumulative and relative frequency distribution.
E) Find the class boundaries, and midpoint.
F) Construct a histogram, frequency polygon, and a pie chart of the data using Microsoft Word or Excel.
Class limits
Frequency
Relative
Frequency
Cumulative
Frequency
Class Boundaries
Midpoint
3