CO_02.jpg

2.3 Further Graphs and Tables for Quantitative Data Objectives: By the end of this section, I will be able to… 1) Build cumulative frequency distributions and cumulative relative frequency distributions. 2) Create frequency ogives and relative frequency ogives. 3) Construct and interpret time series graphs.

Section 2.3 Further Graphs and Tables for Quantitative Data

Frequency Polygon Uses dots to plot the CLASS MIDPOINTS It is NOT a line graph Can be found in the financial section of newspapers/internet

Frequency Polygon Create a frequency polygon by hand Label all your axes Connect your dots! Class Number IntervalClass Midpoint Frequency 10 – – – – – 243 (0 + 4) / 2 2 (5 + 9) / 2 (10+14) / 2 (15+19) / 2 (20+24) /

0 – 4 5 – Intervals Frequency

Cumulative Frequency Cumulative Frequencies gradually add up to the total frequency. # of times arrested Frequency Relative Frequency Cumulative Frequency Cumulative Relative Frequency / / / /

OGIVES Graph that displays cumulative frequency or cumulative relative frequency. # of Times ArrestedCumulative relative frequency

Times Series Plot Graph that displays changes over time. (days, months, years, etcfrequency

Times Series Data MonthFrequency (# of students at Beach) May June July August September

Times Series Data Create a TIMES SERIES PLOT on CALCULATOR