Presentation on theme: "1 Review For Quiz on Pie Charts Constructing Pie Charts Deconstructing Pie Charts Select Vocabulary from Surveys & Variables."— Presentation transcript:
1 Review For Quiz on Pie Charts Constructing Pie Charts Deconstructing Pie Charts Select Vocabulary from Surveys & Variables
2 What is a Pie Chart? A pie chart or __________________________ ______________________________________ What is another name for a Pie Chart? _____________________________________
3 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 4 Pie Chart Characteristics 1.Help________________________________ ___________________________________. 2.Help _________________________________ ____________________________________. 3.Especially useful _____________________. 4.Most effective when ____________________ ____________________________________.
5 4 Pie Chart Characteristics 1.Help an audience understand distribution of data quickly and easily. 2.Help to see how a total is divided into categories 3.Especially useful with categorical data 4.Most effective when the number of segments is 10 or fewer
7 Variable Vocabulary: Variables Come in 2 Varieties 1. Categorical (or Qualitative) 2.Quantitative (or Numerical)
8 Types of Quantitative Variables
10 Reviewing _________ Variables. 6 Characteristics 1.Recorded usually _________________ 2.Records which of several ___________ _____________ belongs to 3.Count data in each ________, but ______________ should not ________ it 4.Can calculate ____________________ 5.Includes all _____________________ 6.Graphing:______________________
11 Categorical Variables 1.Recorded usually with words 2.Records which of several groups an individual belongs to 3.Count data in each group, but you logically should not average it 4.Can calculate %age distributions 5.Includes all yes/no questions 6.Graphing: best illustrated with a pie chart
12 2 Types of Quantitative Variables 1.__________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 2.__________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
13 2 Types of Quantitative Variables 1.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 2.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
14 Vocabulary from Surveys 1.Define a Population in a statistical sense: _______________________________ 2.Define Data in a statistical sense: ________________________________
15 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.
16 Vocabulary from Surveys 1.What is good data? _______________________________ 2.What is bad data? ________________________________
17 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.
18 End Review for Quiz
19 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.
21 Grape Crush Survey
22 Grape Crush Survey
24 Deconstruction of Pie College Profs Time
25 Deconstruction of Pie College Profs Time
26 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?
27 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
28 Broadband Market Share
29 Broadband Companies
30 Broadband Companies
31 Quiz #102 Test Taking Strategies 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