Travon Hamilton
Stats
Dr. Thomas
Stats
Chapter One Notes
Nature of Social Research
-Consumers of social research
-General Public
-Agency Administration
-Policy Makers
-Producers of Social Research
-Academics
-Private Systems
-Private Sector
-Government Ag
Travon Hamilton
Stats
Dr. Thomas
Stats
Chapter Nine Notes
Observation: Increasing the confidence level will increase the margin of error and
widen the confidence interval
Meaning of Confidence Level
Collect a sample, construct a CI. The CI will contain th
Travon Hamilton
Stats
Dr. Thomas
Stats
Chapter Three Notes
-If you have nominal data, you have to use mode
-Ordinal data we use mode/median
-Interval data we use mode/median/mean
Mode
-Most reoccurring number
-There can be two to three modes
Median
-Posit
Travon Hamilton
Stats
Dr. Brian Thomas
Stats
Ch. 7 Notes
Intro to Confidence intervals
Inferential Statistics
Use sample statistics to draw conclusions about population parameters
Confidence intervals
Hypothesis Testing
Goal: Estimate an unknown populatio
Travon Hamilton
Stats
Dr. Thomas
Stats
Chapter Eleven Notes
Conducting a test:
Collect a sample (evidence)
Look at sample statistic
If the observed value of the sample statistic is rare, under the assumption that h0
is true, then we conclude h0 is not tru
Travon Hamilton
Stats
Dr. Thomas
Stats
Ch. Ten notes
How to choose your sample size
Choose your confidence level
Choose your acceptable margin of error
Ex.
Doing a survey with 95 confidence level. Find the sample size assuming we can
tolerate 3% margin of
Travon Hamilton
Stats
Dr. Thomas
Stats
Chapter Three and Six Notes
Numerical Methods for Describing Data
-Mean, Median, Mode
Measures OF relative Standing
-Tells us how one thing stands in relation to the rest of the group
-z scores
-Percentiles, quartile
Travon Hamilton
Stats
Dr. Thomas
Stats
Ch. 4 and 5 Notes
There are two measures of variability
Range
-Highest score minus lowest score
-R=H-L
-Sensitive to outliers
Standard Deviation
-Average distance away from the mean that all scores fall
-Distance awa
Travon Hamilton
Stats
Dr. Thomas
Stats
Ch 7 Notes
Testing Differences Between means
Null Hypothesis- No statistically significant difference between sample means
U1=u2
Alpha Level
Amount of sampling error that we are willing to tolerate
P- Probability tha
Travon Hamilton
Stats
Dr. Thomas
Stats
Ch. Ten Notes
Strength of Correlation
-Strength of correlation between x and y increases as the points in a
scatter plot more clearly form an imaginary diagonal line
Direction
-As one increases one decreases
-Opposit
The Census caught my eye the most on Beverly Hullis page was the total percent of
people that went to college and graduated. Only 7.1% out of the total population (34,188) went
to college and graduated. Before I looked at this census, I was confident that