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## PowerPoint Slideshow about ' Review For Quiz on Pie Charts' - rebecca-odom

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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.

Answering ?s About Profs

- 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?

Answering ?s About Profs

- 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

What you need:

Graphing Calculator

Protractor

Compass

Pencil

Eraser

HW to the HW Box

How you take test:

Answer Vocabulary

Then do #2 Deconstruction

Then do #1 Construction of graph

WATCH THE TIME—

This test is longer

Quiz #102 Test Taking Strategies
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