friday: everyone needs a graphing calculator today
Post on 05-Jan-2016
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FRIDAY:
Everyone Needs a Graphing Calculator TODAY
Data Analysis and Statistics
Objectives
I can input data into the graphing calculatorI can determine if data fits any Parent FunctionI 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)
2nd, +, 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 9 4 3 1 10 6 12 8
Hourly rate of Pay in dollars
17 10 10 7 19 12 20 15
Independent variable is? Years Experience
Dependent variable is? Pay Rate
Input Data into Calculator
Graph the Data
GRAPH buttonZOOM 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 + 5.57
How close were YOU?
Making Predictions
Once we have an equation to match our data, we can make predictionsIf 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 + 5.57
Pay Rate Years Experience
How much will an employee with 20 years experience make?
y = 1.23(20) + 5.57y = 30.17$30.17 per hour
y = 1.23x + 5.57
Pay Rate Years Experience
How many years experience would you need to make $20/hr
20 = 1.23x + 5.5714.43 = 1.23xx = 11.7 years
I Can See Forever
Height(meters)
15 30 45 60 75 90 105
DistanceKm
13.833
19.562 23.959 27.665 30.931 33.883 36.598
What Parent Function??
Homework
Data Analysis WS
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