Quick Start Guide

Quick Start Guide 37

Inference app

The Inference app provides tools for inferential statistics, enabling you to specify

confidence intervals and test hypotheses. Summary statistics from any column in the

Numeric view of the Statistics 1Var or Statistics 2Var app can be imported into it. To

open the Inference app, press ! and select Inference. The app opens in Symbolic

view.

Symbolic view This view provides fields where you can define a confidence interval

or hypothesis test. The fields are as follows:

• Method—Choose hypothesis test, confidence interval, chi-square tests, inference

for regression, or ANOVA

• Type—Choose a specific test or interval distribution based on the T-, Z-, and chi-square distributions

• Alt Hypoth—Choose one of three alternative hypotheses (for hypothesis tests only)

Numeric view Press N to display the Numeric view. This view contains fields

where you can enter sample statistics (for example, sample mean and sample size

n), population parameters (for example, null hypothesis mean μ

and standard

deviation σ), and the significance level α. The menu items are as follows:

• —Moves the cursor to the entry line where you can add or change a value

• —Enables you to import statistics (such as , n, and so on) from any

column in the Statistics 1Var or Statistics 2Var app (or any app based on those

apps)

• —Displays the interval or test results

Tap to see the confidence interval or

hypothesis test results and to return

to the Numeric view.

Press P to display the Plot view. This view

graphically displays the test results or

confidence interval. In inference for

regression, the Plot view cycles through

different plot types for the linear t-test. The

Plot view is not available for all methods.

Tap to display the critical score

against the test score. Press D or U to

decrease or increase the α-level.

DataStreamer app (select models only)

The DataStreamer app enables you to collect real-world data from scientific sensors. It works with the HP StreamSmart 410

data streamer and many of the scientific sensors available from Fourier Systems. You could, for example, work with sensors

that detect temperature, pressure, distance, and the like. The app recognizes the sensors automatically and sets up data

streaming, displaying the incoming data graphically as a stream in real time. See the HP StreamSmart 410 User Guide for

complete details.