1. Data Part 2 of our Math Survival Guide

2. a.Data – Facts or numbers that are collected b.Survey – given to investigate opinions or behaviors by questioning a group c.Population – the group you want to find information about d.Census – a survey of the entire population e.Sample – a group within a population

3. a.Frequency distribution (frequency table) – a table that organizes data to show how many times each item or group of items appears b.How do I use a frequency table? c.How can I use a histogram to display the information from the frequency table?

4. EXAMPLE: How many pets do you have? # of PetsNumber of students 0-1 2-3 4-5 6-7

5. 0 – 1 2 – 3 4 – 5 6 - 7 5 10 15 20 25 30

6. a.Mean – the average b.Median – The middle number in a set of data c.Mode – The number that occurs the most d.What are the outliers and how do they affect a data set?________________

7. a. Range – the difference between the greatest and least values in a data set b. Quartiles 1.1 st Quartile – Lower Quartile (middle of the lower half of data) 2.2 nd Quartile – The median of a data set 3.3 rd Quartile – Upper Quartile (middle of the upper half of data) c. Interquartile Range – IQR = UQ – LQ d. Box-and-Whisker Plot

8. 7 students rated the school food on a scale from one to ten 2, 4, 5, 5, 6, 8, 8 0 1 2 3 4 5 6 7 8 9 10

9. a. Line plots b. Histogram – bar graph with no spaces (best for intervals) c. Bar graph – bar graph that is equally spaced Blue Yellow Purple Black Red Other

10. d. Box-and-whisker plot – splits data into quartiles e. Scatter plot – points on a grid that show a relationship between two sets of data f. Line graph – shows trends over time g. Circle graph – shows percents (part/whole)

11. HINT: LOOK FOR PATTERNS! As x increases, y ______________.