You will have 45 minutes in class to complete the following assignment/quiz (11:45 to 12:30).
Title: Frequency Distributions and Their Graphs
Introduction: This set of exercises will help you read and construct
a frequency distribution and organize data using a graph.
Tasks:
Complete the following exercises from your textbook
Elementary Statistics—Picturing the World:
1. Section 2.1, Exercise #10, p. 43
2. Section 2.1, Exercise #24, p. 45
3. Section 2.2, Exercise #20, p. 58
GOOD LUCK!
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1) a. class width is 5
ReplyDeleteb. midpoints 18, 23, 28, 33, 38, 42, 46
c. class boundries 15.5-20.5, 20.5-25.5, 25.5-30.5, 30.5-35.5, 35.5-40.5, 40.5-45.5, 45.5-50.5
2) Class Frequency Midpoint Relative Cumualtive
30-113.3 5 71.65 0.17 5
113.3-196.6 7 154.95 0.24 12
196.6-279.9 8 238.25 0.27 20
279.9-363.2 3 321.55 0.1 23
363.2-446.5 3 404.85 0.1 26
446.5-529.8 4 488.2 0.13 30
The greatest frequency is 196.6-279.9
The least frequency is 279.9-363.2, 363.2-446.5
3)United States 270
United Kingdom 100
France 49
Sweden 30
Germany 77
Other 157
(Pie Chart is hardcopy only, will turn in at class)
1.)(a) class width 5
ReplyDelete(b)18,23,28,33,38,43,48
(c)15.5-20.5,20.5-25.5,25.5-30.5,30.5-35.5,35.5-40.5,40.5-45.5,45.5-50.5
2.)
Class Frequency Midpoint relative cumulative f
30-113.3 5 71.65 0.17 5
113.3-196.6 7 154.95 0.24 12
196.6-279.9 8 238.25 0.27 20
279.9-363.2 3 321.55 0.1 23
363.2-446.5 3 404.85 0.1 26
446.5-529.8 4 488.2 0.13
30
greatest frequency....196.6-279.9
least frequency......279.9-363.2, 363.2-446.5
3.)cannot paste pie chart here!
Tonya Cox
ReplyDeleteSection 2.1 Exercise #10
A. Class width is equal to 5
B. Class midpoints equal to
a. 16-20 = 26
b. 21-25 = 33.5
c. 26-30 = 56
d. 31-35 = 66
e. 36-40 = 76
f. 41-45 = 86
g. 46-50 = 96
C. Class boundaries equal to
a. 16-20 = 15.5-20.5
b. 21-25 = 20.5-25.5
c. 26-30 = 25.5-30.5
d. 31-35 = 30.5-35.5
e. 36-40 =35.5-40.5
f. 41-45 = 40.5-45.5
g. 46-50 = 45.5-50.5
Here is a link to Take Home Quiz. The other questions are on the other spreadsheets in this .xls document.
ReplyDeletehttp://jwheels.net/school/EG381/TakeHomeQuiz.xls
Here's my answers in this excel sheet
ReplyDeletehttp://www.spectabulous.com/files/school/eg381/eg381_assignment_quiz_1.xls
Mel Bailey
ReplyDelete1. Class width = 5
2. Class midpoints = 18, 23, 28, 33, 38, 43, 48.
3. Class boundaries =
15.5 – 20.5
20.5 – 25.5
25.5 – 30.1
30.1 – 35.5
35.5 – 40.5
40.5 – 45.5
45.5 – 50.5
2.
30-113 71.5 5.8 5
114-197 155 4.14 12
198-281 239.5 3.6 20
282-365 323.5 14.5 22
366-449 407.5 9.6 25
450-533 491.5 7.25 29
3. email!
1. Section 2.1, Exercise #10, p. 43
ReplyDeleteReading a fequency distribution
Tree Height
(a) class width = 5
(b) class midponts = 18, 23, 28, 33, 38, 43, 48
(c) class boundaries =
class__lower limit__upper limit
1______15.5_________20.5
2______20.5_________25.5
3______25.5_________30.5
4______30.5_________35.5
5______35.5_________40.5
6______40.5_________45.5
7______45.5_________50.5
2. Section 2.1, Exercise #24, p. 45
class______f__midpt___rel f___cum f
30-113____5___71.5___0.17____5
114-197___7___155.5__0.24____12
198-281___8___239.5__0.28____20
282-365___2___323.5__0.06____22
366-449___3___407.5__0.1_____25
450-533___4___491.5__0.14____29
198-281 has the greatest frequency
282-365 has the lest fequency
3. Section 2.2, Exercise #20, p. 58
Sent by email
1.) A.)Class width 5
ReplyDeleteB.)18, 23, 28, 33, 38, 43, 48
C.) Class frequency
30-113 5
114-197 7
198-281 7
282-365 2
366-449 3
450-533 4
Relative frequency Midpoint
.1 71.5
.14 155.5
.14 239.5
.04 323.5
.06 407.5
.08 491.5
3)
Class frequency cumulative frequency
ReplyDelete30-113 5 5
114-197 7 12
198-281 7 19
282-365 2 21
366-449 3 24
450-533 4 28
Relative frequency Midpoint
.1 71.5
.14 155.5
.14 239.5
.04 323.5
.06 407.5
.08 491.5
114-197,198-281 has the highest frequency
282-365 has the lowest frequency
3.) I will turn in a hard copy chart on Saturday
Tonya
ReplyDeleteSection 2.1 Exercise #24
Class is:
30-113
114-197
198-281
282-365
366-449
450-533
Class width is equal to 83
Frequency is:
30-113 = 5
114-197 = 7
198-281 = 7
282-365 = 1
366-449 = 3
450-533 = 4
Sum = 27
Class midpoints equal to
30-113 = 71.5
114-197 = 155.5
198-281 = 239.5
282-365 = 323.5
366-449 = 407.5
450-533 = 491.5
Class relative frequency is
.19
.26
.26
.04
.11
.15
Class boundaries are equal to
29.5-113.5
113.5-197.5
197.5-281.5
281.5-365.5
365.5-449.5
449.5-533.5
Class cumulative frequency is
5
12
19
20
23
27
Class w/greatest frequency
114-197
198-281
Class w/ least frequency
282-365
Evan
ReplyDelete1. class width = 5
2. class midpoints= 16+20/2=18, 21+25/2=23, 26+30/2=28, 31+35/2=33, 36+40/2=38, 41+45/2=43, 46+50/2=48
3. Class Boundaries= 15.5-20.5, 20.5-25.5, 25.5-30.5, 30.5-35.5, 35.5-40.5, 40.5-45.5, 45.5-50.5
------------------------------
30-113,30+113/2=71.5,5.8,5
114-197,114+197/2=155,4.14,12
198-281,198+281/2=239.5,3.6,20
282-365,282+365/2=323.5,14.5,22
366-449,366+449/2=407.5,9.6,25
450-533,450+533/2=491.5,7.25,29
greater-196.6-279.9
least- 144-197
--------------------------------
Hard Copy
e-Mailed assignment
ReplyDeleteSection 2.1, Exercise #10, p. 43
ReplyDeleteClass
16 - 20
21 - 25
26 - 30
31 - 35
36 - 40
41 - 45
46 - 50
Frequency, f
100
122
900
207
795
568
322
Midpoint
(16 + 20) / 2 = 18
(21 + 25) / 2 = 23
(26 + 30) / 2 = 28
(31 + 35) / 2 = 33
(36 + 40) / 2 = 38
(41 + 45) / 2 = 43
(46 + 50) / 2 = 48
Lower Boundary
16 - .5
21 - .5
26 - .5
31 - .5
36 - .5
41 - .5
46 - .5
Upper Boundary
20 + .5
25 + .5
30 + .5
35 + .5
40 + .5
45 + .5
50 + .5
Section 2.1, Exercise #24, p. 45
Class
30 - 113
114 - 197
198 - 281
282 - 365
366 - 449
450 - 533
Frequency, f
5
6
9
2
3
4
f = 29
Midpoint
(30 + 113) / 2 = 72
(114 + 197) / 2 = 156
(198 + 281) / 2 = 240
(282 + 365) / 2 = 324
(366 + 449) / 2 = 408
(450 + 533) / 2 = 492
Relative Frequency
5 / 29 = 0.17
6 / 29 = 0.21
9 / 29 = 0.31
2 / 29 = 0.07
3 / 29 = 0.10
4 / 29 =0.14
Cumulative Frequency
5
5 + 6 = 11
11 + 9 = 30
30 + 2 = 32
32 + 3 = 35
35 + 4 = 39
Hard copy of chart to emailed.