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Transcript of CO_02.jpg. 2.1 Graphs and Tables for Categorical Data Objectives: By the end of this section, I will...
CO_02.jpg
2.1 Graphs and Tables for Categorical Data
Objectives:By the end of this section, I will beable to…
1) Construct and interpret a frequency distribution and a relative frequency distribution for qualitative data.
2) Construct and interpret bar graphs and Pareto charts. 3) Construct and interpret pie charts.
Frequency: number of times an observation occurs
Frequency Distribution: table listing all the values and frequency of a variable
Frequency Distributions
LawyerProfessional AthleteMilitary OfficerDoctorScientist
What career do you think is the MOST prestigious?
Frequency Distribution
CAREER
FREQUENCYLawyer
Pro. AthleteMilitary
OfficerDoctor
Scientist
Relative Frequency: frequency divided by the sample size
RELATIVE Frequency
Frequency Distribution
CAREER
FREQUENCYLawyer
Pro. AthleteMilitary
OfficerDoctor
Scientist
Rel. Freq
Using the regular FREQUENCY
Using the RELATIVE FREQUENCY
Bar GraphPARETO CHART: bar graph when the bars are put in order from highest to lowest.
Pie Charts
Common Statistical Graphs
Common Statistical Graphs
Who is that guy?What does he have to do with Statistics?
Its Julius Caesar!And he developed the Caesar Cipher.It was used to encode messages.
So what? Well we can use statistics to DECODE messages.
Frequency of Letters
Decode this Message
“Zcdmpc G bgqamtcpcb rfc kgpyajcq md qagclac, kyega psjcb rfc umpjb.”- Ugjjgyk Iykiuykzy
“Before I discovered the miracles of science, magic ruled the world.- William Kankwamba
Decode this Message
“M wipp mgi mr xli amrxiv, M wipp jmvi mr lipp, M eq e lywxpiv fefc, M’pp wipp aexiv xs e aipp” Nec D
“I sell ice in the winter, I sell fire in hell, I am a hustler baby, I’ll sell water to a well” Jay Z
“P nva alzalk mvy hpkz. P ruvd ihyhjr nva alzalk mvy hpkz. Aolyl'z uv zohtl pu ilpun alzalk mvy hpkz. Pa'z hu ptwvyahua aopun."
-Qvl Ipklu
"I got tested for AIDS. I know Barack got tested for AIDS. There's no shame in being tested for AIDS. It's an important thing.“
Joe Biden