Summary
Summary Stats 188 chapter 2 notes
- Course
- Institution
Summary of chapter 2, covered in the first term
[Show more]
1 review
By: eckojvr • 1 year ago
Seller
Follow
juliayates19
Reviews received
Content preview
CHAPTER 2: ORGANISING ANDVISUALISING VARIABLES
Organising data creates both tabular and visual summaries:
● Summaries both guide further exploration and sometimes facilitate decision
making.
● Visual summaries enable rapid review of larger amounts of data & show
possible significant patterns
ORGANISING CATEGORICAL DATA
Categorical data are organised by utilising tables
,SUMMARY TABLE
● A summary table tallies the frequencies or percentages of items in a set of
categories so that you can see differences between categories
Devices Millennials Use to Watch Movies or Television Shows
Devices Used To Watch Movies or TV Shows Percent
Television Set 79%
Tablet 19%
Smartphone 5%
Laptop / Desktop 42%
CONTINGENCY TABLE
● Used to study patterns that may exist between the responses of two or more
categorical variables
● Cross tabulates or tallies jointly the responses of the categorical variables
● For two variables the tallies for one variable are located in the rows and the
tallies for the second variables are located in the columns
EXAMPLE:
- A random sample of 400 invoices is drawn
- Each invoice is categorised as a small, medium, or large amount
- Each invoice is also examined to identify if there are any errors
- This data is then organised in the contingency table
, TABLES USED FOR ORGANISING NUMERICAL
DATA
ORDERED ARRAY:
● An ordered array = a sequence of data, in rank order, from the smallest value
to the largest value.
● Shows range (min value to max value)
● May help identify outliers
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 juliayates19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.85. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now