Week 4- Midterm Exam EC 315 Quantitative Research Methods
PROBLEM 1
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean
price nationwide is $1.50 per gallon for self-serve regular unleaded. A random sample of
35 station
Park University
EC315
Term Project
Childhood Obesity
Aaron Cluck
1) Purpose Statement
The dependent variable, childhood obesity, is determined by the independent variables, physical
activity, dietary patterns, and environmental factors within the school.
EC315 Midterm Examination
Aaron Cluck
PROBLEM 1 (Weight 40 points).
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price
nationwide is $1.50 per gallon for self-serve regular unleaded. A random sample of 35 station
Chapter 13
Pages 430-432, Questions 40, 44 and 47
Question 40.
A suburban hotel derives its gross income from its hotel and restaurant operations. The owners are
interested in the relationship between the number of rooms occupied on a nightly basis and th
Chapter 6, Page 190, Questions 36 and 39
36. The payouts for the Powerball lottery and their corresponding odds and probabilities of occurrence
are shown below. The price of a ticket is $1.00. Find the mean and standard deviation of the payout.
Hint: Dont
Wk 1 Homework
Pages 92-93, Questions 64, 66, and 67
Note: In problem #67, the baseball data can be obtained from http:/highered.mcgrawhill.com/sites/0073521477/student_view0/index.html (Links to an external site.). Then go to Data sets.
Download the Baseb
Week 4 Homework
Pages 318-319 and 321, Questions 34, 38 and 61
Note: In problem #61, the baseball data can be obtained from http:/highered.mcgrawhill.com/sites/0073521477/student_view0/index.html (Links to an external site.). Then go to Data sets.
Downloa
Park University
EC315
Project and Feasibility Paper Proposal
Childhood Obesity
Aaron Cluck
Purpose Statement
The dependent variable, childhood obesity, is determined by the independent variables,
physical activity, dietary patterns, and family/environment
EC315 Term Paper: Relationships Between Variables
Lakeisha S. Story
Park University
Introduction
The purpose of this project is to research the relationships between the variables GPA,
Age, IQ, Study Time, and the number of classes taken by students. In c
EC/315 Midterm Examination
Name:
Lakeisha Story
Directions:
This test is open-book and open notes and covers the content from weeks 1 through
week 4 of EC/315. The test will be typed and submitted in the Dropbox marked
Midterm
Exam. The midterm is due the
Hypothesis Test: Mean vs. Hypothesized Value
40.000
37.800
12.200
1.575
60
hypothesized value
mean Data
std. dev.
std. error
n
-1.40 z
.0812 p-value (one-tailed, lower)
34.713 confidence interval 95.% lower
40.887 confidence interval 95.% upper
3.087 marg
Question1
1/1pts
InaPoissondistribution,thevarianceisequalto_.
Correct!
n
ex
ThemeanandvarianceofaPoissondistributionarebothequalton.
Question2
1/1pts
WhatistheonlyvariableinthePoissonprobabilityformula?
Correct!
x
e
P
Therandomvariable,x,istheonlyvariabl
Question 1: What is correlation? Does correlation prove causation? Why or why not? Explain and
provide examples to support your explanation.
Correlation is a group of techniques to measure the relationship between two variables. Correlation
signifies the
Week 7 Homework
Pages 351-352, Questions 24, 34, 37, and 38
24. Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there
are more units produced on the night shift than on the day shift. Assume the population stand
EC 315 Unit 3 Discussion Spring 1 2017
1) As a sample size approaches infinity, how does the students t distribution compare to the
normal z distribution? When a researcher draws a sample from a normal distribution,
what can one conclude about the sample
EC 315 Unit 2 Discussion Spring 1 2017
1) Give an example representing a discrete probability distribution and another example
representing a continuous probability distribution. Explain why your choices are discrete
and continuous.
Discrete probability d
Q 1. What is a type I and type II errors in hypothesis testing? What would be examples of each? Explain
A hypothesis is a statement yet to be tested or a statement about a population parameter subject to
verification (p. 290). By definition, a type I erro
As a sample size approaches infinity, how does the students t distribution compare to the normal z
distribution? When a researcher draws a sample from a normal distribution, what can one conclude
about the sample distribution? Explain.
As a sample size ap
Question 1: The F test is used in Analysis of Variance (ANOVA). When would a researcher use an
ANOVA? Explain.
ANOVA Means Analysis of Variance. It is used to analyze the total variability of a set of data. It segregates
the variability into different com
Week 3 Homework
33. The National Collegiate Athletic Association (NCAA) reported that the mean number of hours spent
per week on coaching and recruiting by college football assistant coaches during the season was 70. A
random sample of 50 assistant coache
Question 1
1 / 1 pts
If the null hypothesis that two means are equal is true, where will 97% of the computed z values lie
between?
2.58
2.33
Correct!
2.17
2.07
This is a two-tailed test, so first we split the significance level in half. The significance l
When is the mean the best measure of central tendency? When is the median the best measure of
central tendency? Explain
The purpose of central tendency is to find a measure of location to pinpoint the center of a distribution
of data. The mean is the sum
Give an example representing a discrete probability distribution and another example representing a
continuous probability distribution. Explain why your choices are discrete and continuous.
If the variable can be any value between two specified values it
22. Jacob Lee is a frequent traveler between Los Angeles and San Francisco. For the past month, he
wrote down the flight times on three different airlines. The results are:
Goust
51
51
52
42
51
57
47
47
50
60
54
49
48
48
Jet Red
50
53
52
62
53
49
50
49
58