[INSERT TITLE HERE] 1
Running head: [INSERT TITLE HERE]
[INSERT TITLE HERE]
Student Name
Allied American University
Author Note
This paper was prepared for [INSERT COURSE NAME], [INSERT COURSE
ASSIGNM
If you are constructing a stem-and-leaf display, the "20" in 20.5 would be the
_.
Answer: stem
70. What is the best way to display the relationship between two variables measured
on an interval or rat
Chapter 4
Describing Data: Displaying and Exploring Data
Quartiles divide a distribution into four equal parts.
Answer: True
13. A percentile divides a distribution into one hundred equal parts.
Answe
The percentile range is the distance between any two _.
Answer: percentiles
73. In a symmetric distribution, where is the 99th percentile located?
_
Answer: In the far right tail
Difficulty: Medium
Go
The coefficient of variation for a set of annual incomes is 18%; the coefficient of variation for
the length of service with the company is 29%. What does this indicate?
A) More dispersion in the dist
A percentile can be a decile, but a decile can not be a quartile.
Answer: True
19. A quartile can be a decile, but a decile can not be a percentile.
Answer: False
Difficulty: Easy
Goal: 3
20. For a di
What is the best way to display the relationship between two variables measured on an
interval or ratio level?
Answer: scatter diagram
71. What is the main advantage of a stem-and-leaf chart over a hi
In a contingency table, we describe the relationship between
A) two variables measured at the ordinal or nominal level.
B) two variables, one measured as an ordinal variable and the other as a ratio v
Chapter 4
Describing Data: Displaying and Exploring Data
A dot plot is an easy way to represent the relationship between two variables.
Answer: False
3. A dot plot is useful for quickly graphing frequ
For a distribution, the 2nd quartile, the 5th decile, and the 50th percentile, are the same as the
median.
Answer: True
21. The interquartile range is the difference between the values of the first an
Chapter 4
Describing Data: Displaying and Exploring Data
A student scored in the 85th percentile on a standardized test. This means that the student
scored lower than 85% of all students who took the
The 50th percentile of a distribution is the same as the distribution mean.
Answer: False
18. A percentile can be a decile, but a decile can not be a quartile.
Answer: True
Difficulty: Easy
Goal: 3
19
What statistics are needed to draw a box plot?
A) Minimum, maximum, median, first and third quartiles
B) Median, mean and standard deviation
C) A median and an interquartile range
D) A mean and a stan
A scatter diagram of sales versus production may be constructed by plotting the data on a
graph labeled with sales on the Y-axis and production on the X-axis.
Answer: True
42. A relationship between g
Module 4 Homework 1
Running head: Module 4 Homework
Module 4 Homework
Leah Cummings
Allied American University
Author Note
This paper was prepared for ECN 150, Module 4 Homework taught by Professor Da
In a scatter diagram, we describe the relationship between
A) two variables measured at the ordinal level
B) two variables, one measured as an ordinal variable and the other as a ratio variable
C) two
Multiple Choice
A dot plot shows
A) The general shape of a distribution
B) The mean, median, and mode
C) The relationship between two variables
D) The interquartile range.
Answer: A
45. A row of a ste
A large oil company is studying the number of gallons of gasoline purchased per customer at
self-service pumps. The mean number of gallons is 10.0 with a standard deviation of 3.0
gallons. The median
The test scores for a class of 147 students are computed. What is the location of the test score
associated with the third quartile?
A) 111
B) 37
C) 74
D) 75%
Answer: A
47. What statistics are needed
What is the possible range of values for the coefficient of variation?
A) -1 and +1
B) -3 and +3
C) 0% and 100%
D) Unlimited values
Answer: C
56. A research analyst wants to compare the dispersion in
.
What is the difference between a scatter diagram and a contingency table?
Answer: A scatter diagram requires interval or ratio scaled variables, a contingency table
requires nominal or ordinal varia
Chapter 4
Describing Data: Displaying and Exploring Data
There is some loss of information when raw data is tallied into a stem-and-leaf display.
Answer: False
6. For a stem-and-leaf display, the leaf
What is the main advantage of a stem-and-leaf chart over a histogram?
_
Answer: The identity of each observation is not lost
72. The percentile range is the distance between any two _.
Answer: percent
Chapter 4
Describing Data: Displaying and Exploring Data
In a stem-and-leaf display, it is easy to find the range for a data set.
Answer: True
12. Quartiles divide a distribution into four equal parts
.
What is the third quartile for the distribution of number of sales per hour? _
Answer: Q3 = 6.5 sales per hour
93. For the distribution of number of sales per hour, 50% are greater than
_
Answer: Th
What unit of measurement is used to express the coefficient of variation? _
Answer: percent
81. The coefficient of variation is a measure of _.
Answer: relative dispersion
Difficulty: Medium
Goal: 5
8
Given the sample information in the following table regarding public opinion on gun control,
who is more likely to favor gun control
Answer: Republicans are more likely to favor gun control with 58% f
.
What is the median value? _
Answer: 138 shipments,
Essay
102. What is the common purpose of a scatter diagram and a contingency table?
Answer: Both are used to summarize two variables:
Difficulty: M
The Pearson's coefficient of skewness (Sk) measures the amount of skewness and may range
from -3.0 to +3.0. It is computed by subtracting the median from the mean, multiplying the
result by 3 and divi
What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17,
median of 12 and standard deviation of 6?
A) +2.5
B) -2.5
C) +0.83
D) -0.83
Answer: A
54. A study of busi
Contents
The Stochastic Growth Model
Contents
1.
Introduction
3
2.
The stochastic growth model
4
3.
The steady state
7
4.
Linearization around the balanced growth path
8
5.
Solution of the linearized
Contents
The Overlapping Generations Model and the Pension System
Contents
1.
Introduction
3
2.
The overlapping generations model
4
3.
The steady state
7
4.
Is the steady state Pareto-optimal?
8
5.
Fu