Question#4:Offeryouclassmatesagoodwaytodistinguishbetweenindependentand
dependentvariablesmakesuretheywillunderstandyourexplanation.
Here is a great example that I found on the web.
Example:
Can blueb
Chp 1.
1.18 A researcher studies the average distance that 130 people living in U.S. urban areas walk each week.
a. What is the size of the sample?
b. Identify the population.
c. Is this average a des
Chapter 1: 1.18,1.26, 1.28
1.18
A researcher studies the average distance that 130 people living in U.S. urban areas walk each
week.
a. What is the size of the sample?
The sample size is 130.
b. Ident
7.22 Using the z table in Appendix B, calculate the following percentages for a z score of 2 0.08:
a. Above this z score
P (z > 0.08) = 0.5319
b. Below this z score
P (z < 0.08) = 0.4681
c. At least a
Chapter 5: 5.28, 5.42
5.28 Convert the following proportions to percentages:
a. 0.0173 = 1.73%
b. 0.8 = 80%
0.0173 x 100
.08 x 100
c. 0.3719 = 37.19%
0.3719 x 100
5.42 Random selection or random assi
Statisitcs
Name Jessica Gonzalez
Homework #1
1.
9
8
7
6
5
4
3
2
1
0
The following scores were made by Professor Dougs A. Meany's statistics
students on a test:
68
57
61
52
60
90
49
88
85
69
47
66
74
6
Descriptive statistics
1. distribution of a single variable (univariate or one variable)
2. relationship between 2 or more variables (bivariate: two variables) or (multivariate: more than 2)
Discrete
11/4/2010 Notes
Make sure to go online and find the next homework as well as some handouts to help with what we are
doing.
%CI
(alpha)
Beyond Z
SD
95%
.05
.025
1.96
96%
.04
.03
1.885
Core Assessment P
Assignment #3
1. The McBurger restaurant chain claims that the mean waiting time of consumers is 3 minutes with a population
standard deviation of 1 minute. The quality-assurance department found in a
Ch 6.
Simple Random Sampling-whole population is represented
Stratified Random Sampling- divide into sublists then sample from sublist
Cluster Sampling- Selecting groups of cases (in vicinity) custer
11/09/2010
Proportions
N=500
X=135
99%
Z=2.575
p Z (p)
.272.575 (
p ( 1 p )
n1
)
P=135/500=.27
p
p ( 1 p )
n1
N n
N 1
for a large population the correction factor is
always 1 so no need to use if lar
Ch 7
Between any two points there is an infinite amount of points. So there is no width
between two points; any point estimation is wrong but and interval is accurate.
For elections a candidate might
11/11/2010
Hypothesis testing is just testing a claim
5 steps:
1. Ho: =
2. HA: <, >,
3. Rejection Criteria: Choose CI and (ie. Z=2.575 for 95% CI)
x o
s
4. Test statistic: Z=
n
5. Decision (compared
1
Frances Ramos
PS307
Instructor Stewart
Assignment 1
Chapter 1
1.18 A researcher studies the average distance that 130 people living in the U.S. urban areas
walk each week.
a. What is the size of the
Kimberly Desilus
Park University
PS307
Chapter 1:
1.18
University bookstore employees asked 225 students to complete a customer
satisfaction survey after these customers bought their books. The bookst
7.22
Using the z table in Appendix B, calculate the following percentages for a z score of o.o8
Z table shows 3.19 % mean to z and .4681 or 46.81% in the tail
a. Above this z score
a. 50% + 3.19% = 53
Kaylan Fowler
Unit 2: Assignment
25 August 2017
Chapter 7
7.22 Using the z table in Appendix B, Calculate the following percentages for a z score of -0.08:
a. Above this z score
P (z > -0.08) = 0.5319
Running head: RAISING MINIMUM WAGE AND THE EFFECT ON UNSKILLED
Raising Minimum Wage and the Effect on Unskilled Workers
Venessa L. Mendoza
Park University
1
RAISING MINIMUM WAGE AND THE EFFECT ON UNSK
An Introduction to Statistics and
Research Design
Chapter 1
Two Branches of Statistics
Descriptive statistics
Organize, summarize, and communicate
numerical information
Inferential statistics
Use samp
Chapter 3: 3.18, 3.30, 3.41
3.18 Alumni giving rates for a number of universities, calculated as the number of alumni who
donated and the number who did not donate in a given year, represent which ki
Assignment #3
1. The McBurger restaurant chain claims that the mean waiting time of consumers is 3 minutes with a population
standard deviation of 1 minute. The quality-assurance department found in a