FRIDAY: Everyone Needs a Graphing Calculator TODAY.

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Presentation transcript:

FRIDAY: Everyone Needs a Graphing Calculator TODAY

Data Analysis and Statistics

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

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

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

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

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

Calculator Buttons STAT Data Entry MODE is called STAT

Entering Data

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 years Hourly rate of Pay in dollars Independent variable is? Years Experience Dependent variable is? Pay Rate

Input Data into Calculator

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

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??

Calculator’s BEST Equation y = 1.23x How close were YOU?

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!

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

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

I Can See Forever Height (meters) Distance Km What Parent Function??

Homework Data Analysis WS