ZBox

Displays a graph, lets you draw a box that defines a new viewing window, and updates the window.

ZDecimal

Adjusts the viewing window so that TraceStep=0.1, @X=0.5 and @Y=0.5, and displays the graph screen with the origin centred on the screen.

ZFrac1/2

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZFrac1/3

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZFrac1/4

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZFrac1/5

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZFrac1/8

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZFrac1/10

Sets the window variables so that you can trace in increments of , if possible. Sets TraceStep to and @X and @Y to .

ZInteger

Redefines the viewing window using the following dimensions: TraceStep=1, @X=0.5, Xscl=10, @Y=1, Yscl=10.

ZIntervals[,listname,freqlist,confidence level]
(Data list input)

Computes a z confidence interval.

ZIntervals,v,n[,confidence level]
(Summary stats input)

Computes a z confidence interval.

Zoom In

Magnifies the part of the graph that surrounds the cursor location.

Zoom Out

Displays a greater portion of the graph, centred on the cursor location.

ZoomFit

Recalculates Ymin and Ymax to include the minimum and maximum Y values, between Xmin and Xmax, of the selected functions and replots the functions.

ZoomRcl

Graphs the selected functions in a user-defined viewing window.

ZoomStat

Redefines the viewing window so that all statistical data points are displayed.

ZoomSto

Immediately stores the current viewing window.

ZPrevious

Replots the graph using the window variables of the graph that was displayed before you executed the last ZOOM instruction.

ZQuadrant1

Displays the portion of the graph that is in quadrant 1.

ZSquare

Adjusts the X or Y window settings so that each pixel represents an equal width and height in the coordinate system, and updates the viewing window.

ZStandard

Replots the functions immediately, updating the window variables to the default values.

Z‑Test(m0,s[,listname,freqlist,alternative,drawflag,colour#])
(Data list input)

Performs a z test with frequency freqlist. alternative= L1 is <; alternative=0 is ƒ; alternative=1 is >. drawflag=1 draws results; drawflag=0 calculates results.

Colour#: 10 - 24 or colour name pasted from [vars] COLOUR.

Z‑Test(m0,s,v,n[,alternative,drawflag,colour#])
(Summary stats input)

Performs a z test. alternative=L1 is <; alternative=0 is ƒ; alternative=1 is >. drawflag=1 draws results; drawflag=0 calculates results.

Colour#: 10 - 24 or colour name pasted from [vars] COLOUR.

ZTrig

Replots the functions immediately, updating the window variables to preset values for plotting trig functions.