Using this summary, I managed to pass Statistics 2 with a 9,3. (93%)
This summary contains of what to use when in the calculation of probabilities. As well as that it covers all import theory and definitions.
,Table of Contents
Parameters........................................................................................................................3
Basic Formulas...................................................................................................................4
Multiplication Rule.............................................................................................................4
Addition Rule.....................................................................................................................5
Complement Rule...............................................................................................................5
Conditional Probability.......................................................................................................5
Probability Keywords.........................................................................................................6
What to use when?............................................................................................................7
Dependent & Independent...............................................................................................10
Probability Distribution....................................................................................................10
Binominal Distribution.....................................................................................................11
Normal Distribution.........................................................................................................12
Sampling Errors................................................................................................................13
Sampling Distribution.......................................................................................................13
Confidence Interval..........................................................................................................14
Central Limit Theorem................................................................................................................16
Hypothesis Testing...........................................................................................................18
Two-tailed hypothesis testing...........................................................................................19
T-test................................................................................................................................21
T-test with two samples...................................................................................................22
Chi-square Analysis (Contingency Analysis)......................................................................24
2
, Parameters
Symbol Meaning Extra info
P-value Probability P = always between 0 and 1
(%)
n Number of trials
n Sample size
X Random variable (how many
of a certain outcome)
Ex Expected value What you expect to find
most often. (or on average)
µ Population mean (Mu)
x Sample mean
σ Standard deviation (Sigma)
σx Standard error
μx Mean sampling distribution
H0 Null hypothesis (status Innocent
quo/claim)
HA Alternative hypothesis Guilty
(Researcher’s hypothesis)
3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller branco0116. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.58. You're not tied to anything after your purchase.
