Solution Manual for Business Statistics Communicating with Numbers 2nd Edition by Jaggia and Kelly

Chapter 02 - Tabular and Graphical Methods




Solution Manual for Business Statistics
Communicating with Numbers 2nd Edition by Jaggia
and Kelly


1.
a.




Rating Frequency Relative Frequency

5 12 12/36 = 0.333
4 9 9/36 = 0.250

3 7 7/36 = 0.194
2 5 5/36 = 0.139
1 3 3/36 = 0.083
Total 36 1.000




b. More g;than g;a g;third g;of g;the g;patrons g;are g;very g;satisfied g;with g;the
g; entrees. g;Overall g;more g;than g;half g;of g;the g;customers g;gave g;a g;top
g; rating g;of g;either g;4 g;or g;5. g;Only g;8.3% g;gave g;the g;lowest g;rating.
2.
a.




Rating Frequency Relative g;Frequency

Excellent 5 5/24 g;= g;0.208
Good 12 12/24 g;= g;0.500
Fair 4 4/24 g;= g;0.167
Poor 3 3/24 g;= g;0.125

Total 24 1.000

,Chapter 02 - Tabular and Graphical Methods
g; g; g; g; g; g;

. More than 70% of the patients reveal that they are in
b. The most common resp on se is Good which




g; comprises g; g;
5 0% good ftotal


g; g; g; g; g; g; g; g; g; g;



responses
or g;xcellent g;healthg;conditions.
3.
a.




Expectation Frequency Relative g;Frequency

Better 5 5/25 g;= g;0.20
Same 16 16/25 g;= g;0.64
Worse 4 4/25 g;= g;0.16

Total 25 1.00

Most g;of g;the g;c g;ief ecutives g;(64%) g;believed g;that g;the g;economy g;would g;be


the g;same g;in g;the g;next g;12 g;months.
b.

Expectations of U.S. economy

Worse Better
16% Better
20%
Same

Worse

64%

, 0.70




Relative Frequency
0.60
0.50 Methods
Chapter 02 - Tabular and Graphical
0.40
0.30
0.20
0.10
0.00
Better Same Worse
Expectation Type
4.
a.




Delays Frequency Relative g;Frequency

PM g;Delays 1 1/18 g;= g;0.056
All g;Day g;Delays 6 6/18 g;= g;0.333
AM g;Delays 4 4/18 g;= g;0.222

, None 7 7/18 g;= g;0.389

Total 18 1.000


The g;most g;common g;type g;of g;delays g;was g;‘None’, g;comprising
g; 38.9% g;of g;all g;types. g;The g;second g;most g;common g;type g;was g;‘All
g; Day g;Delays’, g;comprising g;33.3%.
b.


Air Travel Delays
PM Delays
6%

None PM Delays
39% All Day
All Day Delays
Delays
33% AM Delays
None
AM Delays
22%




Air Travel Delays


0.50
Relative Frequency




0.40

0.30

0.20

0.10

0.00

PM g;Delays All g;Day AM g;Delays None
Delays
g;



Delay g;Type
5.

a. g ; 22 g;(18 g;+ g;4) g;out g;of g;50 g;rookies g;received g;a g;rating g;of g;4 g;or
better; g;14 g;(10 g;+ g;4) g;out g;of g;50 g;rookies g;received g;a g;rating g;of g;2
g;



g; or g;worse.