Download presentation

Presentation is loading. Please wait.

Published byTrevon Sammon Modified over 2 years ago

1
Chapter 2 Data

2
Data are information in context The W’s help nail down the context The W’s help nail down the context Who - cases Who - cases What - variables What - variables Where Where When When Why – helps us determine what type of variable we have Why – helps us determine what type of variable we have hoW hoW You must know at least the who, what, and why to say anything useful about the data You must know at least the who, what, and why to say anything useful about the data

3
Two Types of Variables Categorical variable: identify a category for each case Categorical variable: identify a category for each case Quantitative variable: records measurements or amount of something; must have units Quantitative variable: records measurements or amount of something; must have units Remember to use the why to help you determine what type of variable you are looking at Remember to use the why to help you determine what type of variable you are looking at

4
Think Identify the W’s of data, recognize when the information is not given Identify the W’s of data, recognize when the information is not given Identify the cases and variables in a set of data Identify the cases and variables in a set of data Classify a variable as categorical or quantitative depending on its use Classify a variable as categorical or quantitative depending on its use Identify the units of quantitative variables Identify the units of quantitative variables

5
Show NONE NONE

6
Tell Describe a variable in terms of the W’s Describe a variable in terms of the W’s Be sure to mention information that was not provided Be sure to mention information that was not provided

7
What Can Go Wrong? Mislabeling variables: Mislabeling variables: Always think about the why before determining categorical vs quantitative variable Always think about the why before determining categorical vs quantitative variable numerical data is not always quantitative numerical data is not always quantitative Always be SKEPTICAL!!! Always be SKEPTICAL!!! Look at the context of the problem Look at the context of the problem People use bogus statistics to mislead you People use bogus statistics to mislead you

Similar presentations

OK

LSP 120: Quantitative Reasoning and Technological Literacy Özlem Elgün Prepared by Ozlem Elgun1.

LSP 120: Quantitative Reasoning and Technological Literacy Özlem Elgün Prepared by Ozlem Elgun1.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on abo blood grouping images Ppt on city life and village life Ppt on places in our neighbourhood health Ppt on astronomy and astrophysics Avian anatomy and physiology ppt on cells Ppt on question tags rules Gastrointestinal anatomy and physiology ppt on cells Ppt on working of search engines How to download slideshare ppt on negotiations Ppt on curiosity rover