STAB22- Stats Lecture 1, 2, 3, 4 Notes
Essentially Parts of the Course
Data: Collecting, Organizing, Interpreting
Understand world, chose how to act
Separate sense from nonsense.
Learn about the most important concepts and techniques in statistics work.
Provides understanding of use of statistics in your own field.
Gain understanding from data.
From data through analysis to conclusions.
Learn concepts, their interrelationships
Interpretation of software output
The Course Website
Announcements go there
Quiz marks go on Intranet
Not using blackboard! [There is a link to the course website there]
StatCrunch and it's Importance
MyStatLab ---> Click Student ---> butler47874 [course id] ---> Create an ID and password.
Who, what, why, where, when, and how?
[In a plane crash]
Who: The Individual Cases (flights)
What: The Variables
-Categorical: flight number, type of aircraft, mechanical problems.
-Quantitative: number of passengers, lateness (minutes)
Why: Why these variables (help to assess safety and customer service)
When: Don't Know
How: From pilots log. Identifier Variables:
- Identify individual cases
Using Figure 1. -- We can see that peoples opinions on how the family occupation environment has
changed, hasn't in fact differed to greatly from 1991 to 1994.
Using Figure 2. -- In a simple bar graph we can see that more people believe it is ideal for a family to
have one stay at home parent.
All four options chosen by reasonable number of people.
Using Figure 3. -- When we look at a pie graph we can see a different perspective on the number of
people who believe one parent at home is ideal.
Using the comparison bar graphs/ Figure 4. -- We can see that even though the statistics may differ
they haven't changed much.
But if you use a double bar graph you get a clearer view on the difference between the totals in the
The differences are still small.
Introduction to Stat Crunch:
First he clicks on my data [after logging in]
He went to his section called Working parents. One of his files.
Usually; there should be a bunch of options at the top of the page which allows you to do different
Stat crunch is best when graphing because it is very neat and they are easily transferred to
Analysis' of Different Graphs:
The double bar graph allows for more comparison and more accurate comparisons between groups.
Cereal Calories Ste