Texas Instruments TINSPIRECX manual Drawing the Regression Line, Getting the Stats

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Drawing the Regression Line

The line that was fitted by hand and eye can be compared with the calculated linear regression line using option 4 in the Analyze menu. Pressing b461 will display a line with equation of the form y=mx+b.

As usual, you can click and drag on the regression equation to move it to a convenient place.

Getting the Stats

There are two methods for displaying summary statistics:

1.For a single statistic you can type its name and use

the h key to choose the variable, e.g. =median(fshoe).

=MEDIAN(h·

2.On a Lists & Spreadsheet page, you can enter a complete set of statistics into spreadsheet cells.

Open a new Lists & Spreadsheet page and press b41 to see the range of statistical calculations. (Once again these will be very familiar to users of the TI-83/4).

Choose option 1: One-Variable Statistics.

You have the option to display stats for more than one list but for now choose 1 list and then OK.

Choosing the data list can either be done using the Touchpad, or you can type the name.

Type the letter of the column where you want the results to appear.

First Steps with TI-Nspire™

Tutorial 7: One- and two-variable statistics

The calculated regression line

The Statistics Calculations menu

© 2012 Texas Instruments Education Technology

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Contents First Steps About this document Contents Appendix TI-Nspire CX Keypad Layout Nothing on the screen? TI-Nspire DocumentsMemory Charging the handheld Battery LifeHome Screen First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Scratchpad Documents, Problems and PagesNavigating Documents First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Contextual Menus Check list of some key points in Tutorial Basic operations Calculator ApplicationApproximate Calculations History LessonMenu of maths templates TemplatesEffect of changed settings Document settings dialog boxGetting Set Ways to define variables Some AlgebraUse of function notation Statistical Distribution Tables Calculator MenuLists of random integers List of defined variables Variables Linked to DocumentsMaking Notes Why use Notes?Various text formatting Instructions Recording results Format sub-menu Splitting the ScreenWays to split the screen You must press /e and then b More Options from the Notes Menu An inserted comment Use of proof template and symbolsInteractive Notes Use of Q+A templateAsking Questions Check list of some key points in Tutorial Graphs & Geometry Two Views GraphingGraphing Functions Graphing ViewChanging the Axes Grab and Drag PracticeOpen-hand cursor Grabbed tick mark on the axesEditing, Deleting or Hiding a Function Zoom settings Grabbed-sheet iconChanging f2 in the function history Points and coordinates Tracing GraphsTrace picks out significant points Points of intersectionCoordinates and labelled points Analyse Graph MenuManually Moving Graphs Using SlidersAlternative icons Transformed graph and equation Sequence Plotting Check list of some key points in Tutorial View for Plane Geometry GeometryTwo Parallel Lines Drawing the base of the triangleConstruct the Triangle What’s grabbable?Many options in the Construction menu Variables and Text Making MeasurementsMeasurement menu Storing the measurement as a variableDynamic Changes Tidying Up and Using AttributesReady to grab a and slide it Changing the attributes of the triangleUnlocked/Unpinned Points B and C. Try Moving point B Area is now lockedCheck list of some key points in Tutorial Entering Data as Lists Lists & SpreadsheetConflict resolution Using FormulaeOne way to enter a formula Typical Spreadsheet Actions Function Tables Capturing DataHand-made function table Graph and table side by side Simple function table Options for function tablesFrequency Charts One and Two Variable Statistics Charts with One VariableShoe Sizes and Hand Spans Pie Chart displaying categorical data Charts for Categorical DataComparing Boxplots Upper quartile displayedFitting a Line by Hand and Eye Charts with Two VariablesReady to add a 2nd variable Getting the Stats Drawing the Regression LineCalculated regression line Statistics Calculations menu Working with Frequency Data Dragging on the ChartsSets of statistics Effect of moving a point from here … … to hereTexas Instruments Education Technology Check list of some key points in Tutorial Draw and Measure a Circle Multiple RepresentationsMeasured circle Spreadsheet for Data Capture Setting up a scatter plot Data capture is under wayTwo Scatterplots Collecting Just a Little DataFit a Straight Line Go to Town with Data CollectionLinear relationship Moving a straight line by hand Not a linear relationshipRegression Different Approach to ScatterplotsBasic quadratic ready for fitting… … and dragged into place