Scatter Diagrams and Correlation, Least Squares Regression, and Diagnostics on the Least
Squares Regression Line
In this section we are going to be looking at the relationship between two quantitative variables. We will be
looking to see whether the two v
Residual Analysis and Testing Linear Correlation.
The Coefficient of Determination
We looked at a scatter plot to determine if two variables were linearly correlated but in addition to that we have
a measure that tells us how well two variables are linear
ANOVA Analysis of Variance
Analysis of variance is used for testing more than 2 means. The test will be based on the F-distribution which
we discussed when testing two population standard deviations. Remember that an F-curve is similar to a ChiSquared cur
Inference About Two Means dependent samples
Now we will start comparing two parameters from two populations.
Examples of when we might need this:
1. We might want to test whether the mean weight loss for all people on diet plan 1 is less than the mean
wei
Inference About Two Population Proportions and Two Population Standard Deviations
Inference About Two Population Proportions
To find a confidence interval for the difference between two proportions we could use the formula:
to get the two bounds, but luck
MAT 160 Review for Exam 2
What are the possible values for a probability? 0 P(x) 1
What is the rounding rule for all probability problems? 3 significant digits
What is a certain event and what is its probability? An event that must happen (it will rain
th
MAT 160 Review for Exam 2
What are the possible values for a probability?
What is the rounding rule for all probability problems?
What is a certain event and what is its probability?
What is an impossible event and what is its probability?
What makes an e
MAT 160 Solutions to the Review for Exam 3
1. We are 99.74% confident that the true mean amount of pocket money held by
students is between $4.618 and $7.6295.
2. 0.172
3. We are 95% confident that the true mean weight of all packages received by the
parc
1.
2.
3.
4.
5.
6.
MAT 160 Review for Exam 3
A survey revealed the amount of pocket money held by each student in a sample
of students from MAT 160. The amounts in dollars are 5.50, 10.30,
3.15,6.08,4.85,4.80,4.70,8.52,7.90,6.10,3.50,5.40,7.10,9.60,6.20,an
The Logic in Constructing Confidence Intervals About a Population Mean
The Logic in Constructing Confidence Intervals About a Population Mean
In this section we start working more with inferential statistics. We take a sample and based on our sample
resul
Confidence Intervals About a Population Mean in Practice and Confidence Intervals
About a Population Proportion
Confidence Intervals About a Population Mean
Now we will move into the more realistic section . . . where we don't assume that we know the popu
Chapter 7: Normal Probability Distribution
Section 7.1: Properties of the Normal Distribution
Objectives: Students will be able to:
Understand the uniform probability distribution
Graph a normal curve
State the properties of the normal curve
Understand th
MAT 160 - Organizing and Summarizing Data
Grouping Data
Many times we have way too much data to just look at and make observations about. You can have hundreds
and hundreds of pieces of data and keeping it all straight can be a real chore unless you someh
MAT 160 Histogram, Stem-and-Leaf Plots, and Dot Plots
Name _
1. Given the following data,
13.5
13.2
14.5
12.3
14.1
12.8
13.5
15.4
15.7
13.3
10.5
13.9
19.7
15.1
23.8
14.7
16.2
12.8
17.1
22.7
13.2
12.1
13.3
12.4
14.8
Construct a frequency distribution for t
MAT 160 Frequency Distributions
Name _
Given the following data set, construct the requested distributions. The distributions should have 8 classes and
the first lower class limit should be the smallest member of the data set. You must use the formula in
\
MAT 160 Histogram, Stem-and-Leaf Plots, and Dot Plots
Name >
1. Given the following data, '
Construct a frequency distribution for this data with 6 classes.
Fwy:- 2 23.?~lo.) _ 02 if
Akolldaeeeé E ' Construct a stem-and-leaf diagram for your
MAT 160 - Data Collection/ Introduction to the Practice of Statistics
The first few days in the course are used to familiarize you with some definitions we will use throughout the
course. Many of you are taking this course because your specific major requ