Stat 50 Chapter 2 Classwork/Homework Due Monday, July 2
1. Ages of 40 presidents at inauguration
President
Age President
Age President
Washington
57
Pierce
48
Truman
J. Adams
61
Buchanan
65
Eisenhower
Jefferson
57
Lincoln
52
Kennedy
Madison
57
A. Johnson
56
L.B. Johnson
Monroe
58
Grant
46
Nixon
J.Q. Adams
57
Hayes
54
Ford
Jackson
61
George Bush
54
Carter
Van Buren
54
McKinley
54
Reagan
W.H. Harrison
68
T. Roosevelt
42
Bush
Tyler
51
Taft
51
Clinton
Polk
49
Wilson
56
Garfield
Taylor
64
Harding
55
Arthur
Fillmore
50
F.D. Roosevelt
51
Cleveland
Obama
Age
60
61
43
55
56
61
52
69
64
46
49
51
47
47
a) Organize the given data by creating a frequency distribution. (Group the data into six
intervals.)
b) Construct a histogram to represent the data.
2. The instructor for an introductory Statistics class wonders about the complaints that
she is hearing about the time it takes students to complete a computer assignment. The
assignments are designed to be done in about 25 minutes. She asks the members of the
class to time how long it takes to do the next assignment and to hand the data in with the
assignment. The times (in minutes) are listed here: (use six classes)
22.8 27.0 27.9 30.4 33.4 24.8
27.2 27.9
31.1 33.9 24.8 27.4 28.2 31.4 35.3 26.0
27.4 29.4 32.4 35.7 26.0 27.4 29.6 33.1
36.3 26.1 27.6 29.8 33.2 40.4
a) What should the class width be?
b) Create a relative frequency table for the data.
c) Create a graphical display appropriate for the data.
d) Are the data symmetric or skewed?
3. A university collected some data on the amount of money that students spend on
textbooks in a typical semester. Here are the dollar amounts: (n = 42)
239 289
304
323
336 432
256 290
307
324
394 433
280 295
310
326
397 440
284 298
314
330
415 445
284 298
315
331
420 446
287 298 319 332
425 447
287 299 321 334
430 447
a) Construct a frequency table with six classes
b) Construct a Histogram using class boundaries. C) Describe the distribution