ECON 2300 CH2 QUIZ

Econ2300
assignment: Ch2 Quiz

Exercise 2.8 METHODS AND APPLICATIONS
Fifty randomly selected adults who follow professional sports were asked to name their favorite professional sports league. The results are as follows where MLB = Major League Baseball, MLS = Major League Soccer, NBA = National Basketball Association, NFL = National Football League, and NHL = National Hockey League.

                  
  NFL   NBA   NFL   MLB   MLB   NHL   NFL   NFL   MLS   MLB
  MLB   NFL   MLB   NBA   NBA   NFL   NFL   NFL   NHL   NBA
  NBA   NFL   NHL   NFL   MLS   NFL   MLB   NFL   MLB   NFL
  NHL   MLB   NHL   NFL   NFL   NFL   MLB   NFL   NBA   NFL
  MLS   NFL   MLB   NBA   NFL   NFL   MLB   NBA   NFL   NFL
________________________________________
 

 1.
award:
10 out of
10.00 points
 
 
 
Exercise 2.8 METHODS AND APPLICATIONS Part a
(a) Find the frequency distribution, relative frequency distribution, and percent frequency distribution for these data. (Round your Relative Frequency answers to 2 decimal places.)

Sports League Frequency Relative
Frequency Percent
Frequency
MLB 11      0.22      22    
MLS 3      0.06      6    
NBA 8      0.16      16    
NFL 23      0.46      46    
NHL 5      0.10      10    
  ________________________________________   
Total 50        
  ________________________________________   
________________________________________

 
 2.
 
 
Exercise 2.8 METHODS AND APPLICATIONS Part b
(b) Choose the frequency bar chart for these data.
 
 
 
 
 
 

 3.
 
 
Exercise 2.8 METHODS AND APPLICATIONS Part c
(c) Choose the pie chart for these data.
 
 
 
 
 
 
eBook Link
Multiple Choice Difficulty: Medium 
Exercise 2.8 METHODS AND APPLICATIONS Part c Learning Objective: 02-01 Summarize qualitative data by using frequency distributions, bar charts, and pie charts. 

 4.

 
 
Exercise 2.8 METHODS AND APPLICATIONS Part d
(d) Which professional sports league is most popular with these 50 adults? Which is least popular?

  Most popular league is NFL   and least popular is MLS  .

Exercise 2.25 THE CASE
Forbes magazine publishes a list of "The 400 Best Big Companies" as selected by the magazine's writers and editors. Table 2.13 gives the best companies in the retailing industry as given by this list on the Forbes.com website on February 27, 2007.
 5.
 
 
Exercise 2.25 THE CASE Part b-1
(b-1) Choose the percent frequency histogram for the sales values.
 
 
 
 
 
 
 
 6.
 
 
Exercise 2.25 THE CASE Part b-2
(b-2) What is the distribution shape?
 
 
Skewed left
 
Skewed right
 
Symmetric
Supplementary Exercise 2.66 THE CIGARETTE ADVERTISEMENT CASE
A manufacturer produces a bulk chemical product. Customer requirements state that this product must have a specified viscosity when melted at a temperature of 300°F (viscosity measures how thick and gooey the product is when melted). Chemical XB-135 is used in the production of this chemical product, and the company's chemists feel that the amount of chemical XB-135 may be related to viscosity. In order to verify and quantify this relationship, 24 batches of the product are produced. The amount (x) of chemical XB-135 (in pounds) is varied from batch to batch and the viscosity (y) obtained for each batch is measured. Table 2.23 gives (in time order) the values of x and the corresponding values of y obtained for the 24 batches.
 7.
 
 
Supplementary Exercise 2.66 THE CIGARETTE ADVERTISEMENT CASE Part a
(a) Choose the scatter plot of viscosity (y) versus the amount (x) of chemical XB-135.
 
 
 
 
 
 
 

 8.
 
 
Supplementary Exercise 2.66 THE CIGARETTE ADVERTISEMENT CASE Part b
(b) Choose the kind of relationship between y and x.
 
 
Strong positive linear relationship
 
There is no relationship
 
Strong negative relationship
The data produces a scatter plot with data forming in an upward slanting line to the right.
Such a plot indicates a strong positive relationship.

9.
 
 
MC Qu. 12 ________ can be used to study the relationsh...
________ can be used to study the relationship between two variables.
 
Cumulative frequency distributions
 
Dot plots
→
Crosstabulation tables
 
Frequency tables
12.
 
 
MC Qu. 20 A ______________ displays the frequency of e...
A ______________ displays the frequency of each group with qualitative data and a _____________ displays the frequency of each group with quantitative data.
 
scatter plot, bar chart
 
stem and leaf, pie chart
 
histogram, stem and leaf display
 
bar chart, histogram
17.
 
 
MC Qu. 26 Which of the following graphical tools is no...
Which of the following graphical tools is not used to study the shapes of distributions?
 
Dot plot
→
Scatter plot
 
Stem-and-Leaf display
 
Histogram
19.
 
 
MC Qu. 41 A company collected the ages from a random s...
A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:

What is the relative frequency for the largest interval?
 
.132
 
.231
 
.226
→
.283
 
.288
20.
 
 
MC Qu. 42 A company collected the ages from a random s...
A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:

What is the midpoint of the third class interval?
 
37.5
 
27.5
 
22.5
 
32.5
 
42.5
25.
 
 
MC Qu. 63 Consider the following data on distances tra...
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the distances over 24 miles.

 
 
.125
 
.375
 
.325
 
.025
→
.150
35.
 
 
MC Qu. 40 A company collected the ages from a random s...
A company collected the ages from a random sample of its middle managers with the resulting frequency distribution shown below:

What would be the approximate shape of the relative frequency histogram?
 
Skewed to the right
 
Multiple peak
 
Skewed to the left
 
Uniform
 
Symmetrical
40.
 
 
MC Qu. 55 A histogram that tails out towards smaller v...
A histogram that tails out towards smaller values is _____.
 
a scatterplot
 
skewed to the right
→
skewed to the left
 
normal
41.
 
 
MC Qu. 58 A(n) ________ is a graph of cumulative distribu...
A(n) ________ is a graph of cumulative distribution.
 
ogive plot
 
bar chart
 
frequency histogram
 
relative frequency histogram
42.
 
 
MC Qu. 72 The number of weekly sales calls by a sample...
The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below:
24, 56, 43, 35, 37, 27, 29, 44, 34, 28, 33, 28, 46, 31, 38, 41, 48, 38, 27, 29, 37, 33, 31, 40, 50
How many classes should be used in the construction of a histogram?
 
10
 
2
 
4
 
6
→
5