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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

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 __________)

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:______________________

• 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

• 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

• 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.

Deconstruction of PieCollege Profs Time

Deconstruction of PieCollege Profs Time

• 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

Graphing Calculator

Protractor

Compass

Pencil

Eraser

HW to the HW Box

How you take test: