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Review For Quiz on Pie Charts

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Constructing Pie Charts

Deconstructing Pie Charts

Select Vocabulary from Surveys & Variables

A pie chart or __________________________

______________________________________

______________________________________

What is another name for 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

- Help________________________________ ___________________________________.
- Help _________________________________ ____________________________________.
- Especially useful _____________________.
- Most effective when ____________________ ____________________________________.

- 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

- __________ (or __________)
- __________ (or __________)

- Categorical (or Qualitative)
- Quantitative (or Numerical)

- Recorded usually _________________
- Records which of several ___________ _____________ belongs to
- Count data in each ________, but ______________ should not ________ it
- Can calculate ____________________
- Includes all _____________________
- Graphing:______________________

- 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

- __________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

- DiscreteIf the Q variable is a set Quantitativeof 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
- ContinuousIf the Q variable forms an entire Quantitativeinterval along the number line, we Variablecall it this. (i.e., it’s a number & it can be any value). Can be measured

Variable

- Define a Population in a statistical sense: _______________________________
- Define Data in a statistical sense: ________________________________

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.

- What is good data? _______________________________
- What is bad data? ________________________________

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.

- 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

Broadband

Market

Share

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