Review For Quiz on Pie Charts

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# Review For Quiz on Pie Charts - PowerPoint PPT Presentation

Review For Quiz on Pie Charts. Constructing Pie Charts Deconstructing Pie Charts Select Vocabulary from Surveys & Variables. What is a Pie Chart?. A pie chart or __________________________ ______________________________________ ______________________________________

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Presentation Transcript
Review For Quiz on Pie Charts

Constructing Pie Charts

Deconstructing Pie Charts

Select Vocabulary from Surveys & Variables

What is a Pie Chart?

A pie chart or __________________________

______________________________________

______________________________________

What is another name for a Pie Chart?

_____________________________________

What is a Pie Chart?

A pie chart or circle graph has sectors that visually display proportional parts of a total set of data that share a common variable

Another name: Circle Graph

4 Pie Chart Characteristics
• Help________________________________ ___________________________________.
• Help _________________________________ ____________________________________.
• Especially useful _____________________.
• Most effective when ____________________ ____________________________________.
4 Pie Chart Characteristics
• Help an audience understand distribution of data quickly and easily.
• Help to see how a total is divided into categories
• Especially useful with categorical data
• Most effective when the number of segments is 10 or fewer
Reviewing Variable Types
• __________ (or __________)
• __________ (or __________)
Variable Vocabulary:Variables Come in 2 Varieties
• Categorical (or Qualitative)
• Quantitative (or Numerical)
Reviewing _________ Variables. 6 Characteristics
• Recorded usually _________________
• Records which of several ___________ _____________ belongs to
• Count data in each ________, but ______________ should not ________ it
• Can calculate ____________________
• Includes all _____________________
• Graphing:______________________
Categorical Variables
• Recorded usually with words
• Records which of several groups an individual belongs to
• Count data in each group, but you logically should not average it
• Can calculate %age distributions
• Includes all yes/no questions
• Graphing: best illustrated with a pie chart
2 Types of Quantitative Variables
• __________ If the Q variable is a set of isolated points on the number line, we call it this. (i.e., it’s a number but it only comes in certain values). Can be counted
• __________ If the Q variable forms an entire interval along the number line, we call it this. (i.e., it’s a number & it can be any value). Can be measured
2 Types of Quantitative Variables
• Discrete If the Q variable is a set Quantitative of isolated points on the number line, we call it this. (i.e., it’s a number but it only comes in certain values). Can be counted
• Continuous If the Q variable forms an entire Quantitative interval along the number line, we Variable call it this. (i.e., it’s a number & it can be any value). Can be measured

Variable

Vocabulary from Surveys
• Define a Population in a statistical sense: _______________________________
• Define Data in a statistical sense: ________________________________
Vocabulary from Surveys

1. Define a Population in a statistical sense: A population is an entire collection of individuals or objects about which information is desired.

2. Define Data in a statistical sense Data are numbers collected in a particular context. During a survey, the interviewer collects it. It always has units.

Vocabulary from Surveys
• What is good data? _______________________________
• What is bad data? ________________________________
Vocabulary from Surveys

1. Good Data in a statistical sense

Good Data is the result of intelligent effort and good random sampling methods.

2. Bad Data in a statistical sense

Bad Data are the result of laziness, lack of understanding, the desire to mislead others or bad sampling methods.

Classwork & Homework
• Use the terms you’ve learned to deconstruct pie charts
• Answer some the ‘usual’ questions about the nature of the survey using the data and your powers of analysis.
• What is question to answer?
• What is the population?
• Describe the sample: numbers, units other description
• Variables? Q or C?
• Units or 2 categories
• Conclusions?
• What is question to answer?
• In teaching
• What is the population?
• Typical college professors
• Describe the sample: numbers, units other description
• ‘an average’ college professor
• Variables? Q or C?
• Time; Categorical
• Units or 2 categories
• Teaching, consulting, research, growth, comm serv, etc
• Conclusions?
• Most time is spent in teaching

Market

Share

What you need:

Graphing Calculator

Protractor

Compass

Pencil

Eraser

HW to the HW Box

How you take test: