Survey

# Download Document

Document related concepts

no text concepts found

Transcript

20S Applied Math Mr. Knight – Killarney School Unit: Real Number System Lesson: LMP-L3 Creating Lines of Best Fit using Winstats Lines of Best Fit Using Winstats LMP-L3 Objectives: To use Winstats to create lines of best fit. Learning Outcome B-4 Slide 1 20S Applied Math Mr. Knight – Killarney School Unit: Real Number System Lesson: LMP-L3 Creating Lines of Best Fit using Winstats The following data describes the number of bacteria present at amounts of time following an antibacterial spray being applied. Winstat can simplify the process of making a scatterplot and finding a line of best fit. Open Winstats Click on Window > Multi-Var Data In the new window go Edit > Dimensions Key in 7 and 2 as the number of rows and columns Objectives Slide 2 20S Applied Math Mr. Knight – Killarney School Unit: Real Number System Lesson: LMP-L3 Creating Lines of Best Fit using Winstats Click on Data (in red) in the first column and change the text to Hours. Press Enter to accept the entry. Similarly click on Data in the second column and change the text to Bacteria. Press Enter. Enter the data. (If you right-click on a data cell, then each time you hit enter you go to the next cell. If you only left-click, hitting enter exits the data-entry process.) Go Edit > Format. Change decimal place to 2. Click on View and then on Set corners… and change the extremes to the values shown on the right. Example 1 – Slope review Slide 3 20S Applied Math Mr. Knight – Killarney School Unit: Real Number System Lesson: LMP-L3 Creating Lines of Best Fit using Winstats Go Plot > 2D Plot A In the new window, go Line > Least-Sq to get a line of best fit to show. Mess with View > Overlay Axes, View > Corners and View > Grid to make the scatterplot look like the one at right. Notice the Equation, in the form y=mx+b. We can use this derived equation to analyze this situation further if we wish. Example 2 – Slope review Slide 4