1. C. A. Warm Up 1/28/15 SoccerBasketballTotal Boys1812 Girls1614 Total Students were asked which sport they would play if they had to choose. 1)Fill in the marginal frequencies. 2)What percentage of students who would choose soccer are boys? 3)What percentage of students chose basketball? 4)What percentage of students who chose soccer where girls?

2. SID.6: SCATTER PLOTS Jan. 28 th, 2015

3. Vocabulary Scatter Plot – a graph that shows the relationship between two _______________ on the same _______. Response Variable – variable whose value can be explained by, or is determined by the value of the ___________ variable. Goes on the ____ axis Predictor Variable – variable who value can influence or determine the __________variable. Goes on the _____axis. variables plane predictory response x

4. Ex 1). Create a scatter plot from the table below.

5. Discussion: 1). What type of relationship seems to exist between study time and math SAT score?

6. Types of Relationships: Positive Negative Strong Weak

7. Ex 3). Construct a scatter plot for the data below. Describe the relationship illustrated by the scatterplot.

8. Correlation – the measure of how well a ______________________fits a set of data. The ________________ coefficient is a value between ____ and ____ which indicates how close the data are to forming a straight line. The _____________ the correlation coefficient is to 1 or -1, the ______________the linear relationship is between the two variables. Linear function correlation 1 closer stronger

10. Ex 1). Describe the relationship of the graph to the right. Guess it’s correlation coefficient. Ex 2). Describe the relationship of the graph to the right. Guess it’s correlation coefficient.

11. Assignment: Complete the ½ Sheet Assignment: Scatter Plots 1/28/15