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Review For Quiz on Pie ChartsPowerPoint Presentation

Review For Quiz on Pie Charts

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Review For Quiz on Pie Charts

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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

- 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

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.

Deconstruction of PieCollege Profs Time

Deconstruction of PieCollege Profs Time

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

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