STAT 146
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Stat 146
Weekly #6: Proportions
One of the questions on the General Social Science Survey asked whether or not the respondents believed in
miracles. The results are summarized below.
SEX
TOTALS
1: MALE
2:
FEMALE
1: YES, DEFINITELY
278
460
738
2: YES, PROB
Weekly #9: Multiple Regression
Ninety-two students in a statistics class performed the following experiment. Each student recorded
his/her pulse rate and then flipped a coin. If the coin came up Heads, the student ran in place for a minute.
Otherwise, the
Notes on Inference for One or Two Proportions
When summarizing and analyzing categorical data, we use the proportion.
DATA SET TYPE
Population
Sample
NUMERIC SUMMARY MEASURES
Parameters
Statistics
p
In order to do statistical inference, we need to satisfy
WS # 6 D6: Paired Observation t-tests: :
CI and Hypothesis Tests for the Difference in Population Means
Open a new Word document. Label your Report with
your name and
section number,
the date, and
the name of the assignment
The data:
Go to the Courses dri
Cory Morgan
STAT 146 Section 06
WS #6 Paired Observation t-tests and CI
9/11/14
1.
Identify the parameter of interest
Identify the confidence level.
Determine the interval limits.
d:truemeandifferenceofstandingpulserate
95% confidence interval
13.74 and 2
Chapter 1-5: Comprehensive Test
Name _
1. By definition, a subset of a population selected for study is a
a)
b)
c)
d)
e)
sample
simple random sample
cluster sample
systematic sample
None of these
2. The distinction between descriptive and inferential stat
Stat 2
Weekly #2:
Single Sample Confidence Intervals and Hypothesis Tests for the Mean
Show the steps and make your report professional looking.
Open the data set: Sept2014SurveyData.MTW available in myCourses.
PROBLEM 1:
a.
Find a point estimate of, the
WS # 4 D4 One-Sample Confidence Interval for the Mean
One-Sample Confidence Intervals for a Mean ()
Data must be numeric
Data should follow (at least approximately) a Normal distribution OR you need a big sample size
The Lung Capacity data These data are
WS #19 CI and PI for y
The CollMass data : Q:\320(Mathiason-Crystal) dataset CollMass.
Several variables are recorded on 60 four-year colleges in Massachusetts. One variable we
are interested in is the average math score on the SAT. Among the variables in
Cory Morgan
STAT 146 Section 06
WS #14 Chi Square Goodness of Fit
10/21/14
Problem 1:
a. Specific proportions
b. Test the appropriate hypotheses using = .05.
Describe the population
p1 = the true proportion of people with Democratic party affiliation.
par
Statistics II
Day 2
WS #2 D 2: Bivariate Data Analysis
Your Daily and Weekly Assignments will be graded on a 10 point scale. Format IS important. You will lose an entire letter grade for
unacceptable formatting.
When answering the questions and performing
Stat 2
WS #10: Randomized Block Designs (ANOVA)
Lipids (fats) are needed by the body to build cell membranes, make certain hormones, and store energy.
Cholesterol and triglycerides are the main types of lipids measured in routine blood chemistry tests. Bl
WS # 13: CI and Hypothesis Tests for Two Proportions
Open a new Word document. Label your Report with your name and section number, the date, and the
name of the assignment Open the data set from myCourses entitled SURVEY DATA DOWNLOADED 8-132013. Today w
WS #16: Chi Square Mixed Practice
Problem 1:
Grade distribution guidelines for a statistics course at a major university are: 10% A, 30% B, 40% C, 15% D, and 5% F. A
sample of 120 statistics grades at the end of a semester showed 18 As, 30 Bs, 40 Cs, 22 D
Cory Morgan
STAT 146 Section 06
WS #16 Chi Square Mixed Practice
10/28/14
Problem 1:
a. 15% of the statistics grades were As.
b. Ho: pA = 10%
pB = 30%
pC = 40%
pD = 15%
pF = 5%
Ha: The true proportions of statistics grades are not all equal to the specifi
Cory Morgan
STAT 146 Section 06
WS #3 One-Sample Confidence Interval for the Mean
9/4/13
1a.
DescriptiveStatistics:Capacity
Variable
Capacity
N
41
Mean
3.670
StDev
1.024
Minimum
2.200
Q1
2.875
Median
3.500
Q3
4.250
Maximum
5.750
1b.
Boxplot of Capacity
2
Statistics II
Day 1
Worksheet #1: Introduction to Minitab and Descriptive Statistics
GENERAL INSTRUCTIONS:
For your daily worksheets, open the assignment from Content in myCourses.
Then also open a new Word document.
Your Daily and Weekly Assignments will
Cory Morgan
Stat 146 Section 06
8/28/14
WS #2 Minitab and Bivariate Data Analysis
1a.
DescriptiveStatistics:height
Variable
height
gender
Female
Male
N
58
50
Mean
64.741
70.005
StDev
2.510
3.344
Minimum
59.000
59.000
Q1
63.000
68.000
Median
64.000
70.000
Cory Morgan
STAT 146 Section 06
WS #12 Inference for One Proportion
10/9/14
1a.
Identify the parameter of interest
Identify the confidence level.
Determine the interval limits. (Minitab Printout)
p: True proportion of residents who are recycling
95% confi
WS #12 Inference for One Proportion
Use the templates for your confidence intervals and hypothesis tests.
Task 1: Of 150 Chattanooga residents surveyed, 64 indicated that they participated in a recycling
program.
a.
Construct a 95% confidence interval est
WS # 3 D3: Sampling Distributions
Refer to the model I provided for instructions regarding the format for your report.
Last time we worked with the random variable x. We found the probability that x was greater or
less than some number using Minitab. Toda
Stat II
WS #8: Introduction to ANOVA
Studies conducted in Australia indicate that there may be a difference between the pain thresholds of
blondes and brunettes. Men and women of various ages were divided into four categories according to
hair color: ligh
WS #14: Chi Square Goodness of Fit
Problem 1 According to the General Social Science Survey, in 1972, of 1838 people surveyed, 762 identified
themselves as Democrat, 419 identified themselves as Republican, 588 identified themselves as
Independent and 69
Cory Morgan
STAT 146 Section 06
WS #19 CI and PI for y
11/13/14
a.
RegressionAnalysis:%Graduateversus%Top20%
Method
Rows unused
35
Analysis of Variance
Source
Regression
%Top20%
Error
Lack-of-Fit
Pure Error
Total
DF
1
1
23
22
1
24
Adj SS
3135.7
3135.7
163
Notes on Single Sample Hypothesis Testing
1. A statement is made regarding the nature of the population parameter.
2. Evidence (sample data) is collected in order to test the statement.
3. The data is analyzed to assess the plausibility of the statement.
Dominic Furgal
Daily 10
Task 1:
Chart of Year, FEPOL
FEPOL
Disagree
Agree
100
Percent
80
60
40
20
0
Year
2000
2006
Percent is calculated within levels of Year.
From the looks of the bar chart most people tend to disagree. From 2000 to 2006 there is a slig
Week 1 S-2
X
N
O
Week 1 S-3
Week 1 P1
1200 x
150 n
300 o
0.01
0.005
0.995
2.57 z
40
150
10
0.15
0.075
0.925
1.44
z
1262.95188639 max
1.175755077 max
1137.04811361 min
8.824244923 min
Week 1 S-7
find 99% conf level assuming its part
of normal distribution