Correlation
In statistics, there is an important measure called the correlation coefficient. It is usually
symbolized with the Greek letter (rho). It is a measure of how one random variable varies with
another random variable. If we have two random variab
BUAD 300
Chi-square test for normality of regression errors
The following material is covered in your text on pages 530-534. Note the correspondence of the
table below with the table on page 532 of the text.
Using the errors from an OLS regression estimat
RuiquanChen
1.1.3
A
1.1.4
B
1.1.5
The Parameter of interest describes Lebron career shooting percentage over the life time.
56.5% is a statistic because it summarized 2012 and 2013 average shooting percentage.
The chance model would assign 0.5, which is 5
RuiquanChen
3.3.6
CI = 0.35+1.96(0.01508)=0.3795
CI=0.35-1.96(0.01508)=0.3204
CI = 32.04% to 37.95%
We are 95% of confident the proportion is between 32.04% to 37.95%
3.3.11
The Observation Units is the student is the statistics class
The Variable is th
RuiquanChen
1.1.6
The long-run proportion of Dwyane making a field goal is a parameter.
52.1% is a statistic because it averages the Miami heat hit in 2012-2013.
When I simulation possible outcome assuming the chance model. I would flip the coin 1093
time
RuiquanChen
Assignment#1
P.1.10
A: The soap and the people are the observation unit in this study
B: The three variable are peoples gender, location, hand wash or not
C:Are the people wash their hand after used the restroom? If so, which gender has the mo
Chapter 1
An Introduction to Statistics and
Research Design
I. Two Branches of Statistics
A. Describe data
Descriptive Statistics: Organize,
summarize, and communicate a group of
numerical observations.
I. (continued)
B. Make inferences.
Inferential Stati
Chapter 2. Frequency Distributions
I. Frequency Distributions
Raw Scores: data that has not been analyzed yet.
Frequency Distribution: describes the pattern of a set of
numbers by displaying a count or proportion for each
possible value of a variable.
Sev
Central Tendancy
o Is a descriptive statistic that best represents the center of a data set
o Three measures:
Mean: Arithmetic average
Median: middle score
Mode: most common score
Symbols
o Symbols for mean: M & X (with line above it)
o X: refers to s
Chapter 4
Central Tendency and Variability
I. Central Tendency
Is a descriptive statistic that best represents the center of a data
set.
Three measures of Central Tendency:
1. Mean: Arithmetic average.
2. Median: Middle score.
3. Mode: Most common score
Homework Assignment Chapter 1
1. The two branches of statistics are _ and _.
a. theoretical statistics; applied statistics
b. research design; data analysis
c. numerical methods; graphical methods
d. descriptive statistics; inferential statistics
2. Socia
CHAPTER 5
Sampling and Probability
Two General Forms of Samples:
Random Samples every member of the population has an
equal chance of being selected.
Random Sampling is ideal but expensive, time-consuming and often
impossible.
Convenience Samples uses
Raw Scores: Data that has not been analyzed yet
Frequency Distribution: describe the pattern of a set of numbers by displaying a count or
proportion for each possible value of a variable
Frequency Table: Displays counts for each value of one interval var
It was determined based on the data collected that a 2x2 Chi-Square test was the best decision to test the data collected. The main reason behind choosing a Chi-Square is the data was classified as categorical data. And the reason 2x2 was chosen is t