2. FRIDAY: Everyone Needs a Graphing Calculator TODAY

3. Data Analysis and Statistics

4. Objectives I can input data into the graphing calculator I can determine if data fits any Parent Function I can find an equation to model the data I can predict unknown values using the equation

5. Importance of Data Analysis If you are going into any field that uses data such as (accounting, research, business, banking, restaurants, hotels, airlines, manufacturing, ….. and the list goes on

6. Independent versus Dependent Independent Variable (Plots on x-axis) Dependent Variable (Plots on y-axis) Independent Dependent

7. Data Entry (you should clear the calculator before beginning) 2 nd, +, 7, 1, 2

8. Turn on the plotter 2nd y=, 1: enter, arrow to “on” enter, enter You should see the following Default selections below:

9. Calculator Buttons STAT Data Entry MODE is called STAT

10. Entering Data

11. The table below shows the years of experience for eight technicians at Lewis Techomatic and the hourly rate of pay each technician earns. Experience in years9431106128 Hourly rate of Pay in dollars 1710 719122015 Independent variable is? Years Experience Dependent variable is? Pay Rate

12. Input Data into Calculator

13. Graph the Data GRAPH button ZOOM 9 What PARENT Function does this model? Let’s Experiment to find the best equation for this data??

14. Finding an Equation to match the Data Try the Parent Function y = x What do we need to do to get this to MATCH? Think of your Transformations??

15. Calculator’s BEST Equation y = 1.23x + 5.57 How close were YOU?

16. Making Predictions Once we have an equation to match our data, we can make predictions If the trend of data continues, we can predict any future or past data point we don’t already have. You must KNOW what each variable represents!

17. y = 1.23x + 5.57 Pay RateYears Experience How much will an employee with 20 years experience make? y = 1.23(20) + 5.57 y = 30.17 $30.17 per hour

18. y = 1.23x + 5.57 Pay RateYears Experience How many years experience would you need to make $20/hr 20 = 1.23x + 5.57 14.43 = 1.23x x = 11.7 years

19. I Can See Forever Height (meters) 153045607590105 Distance Km 13.83319.56223.95927.66530.93133.88336.598 What Parent Function??

20. Homework Data Analysis WS