HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 127

hp40g+.book Page 1 Friday, December 9, 2005 1:03 AM 11 Inference aplet About the Inference aplet The Inference capabilities include calculation of confidence intervals and hypothesis tests based on the Normal Z-distribution or Student's t-distribution. Based on the statistics from one or two samples, you can test hypotheses and find confidence intervals for the following quantities: • mean • proportion • difference between two means • difference between two proportions Example data When you first access an input form for an Inference test, by default, the input form contains example data. This example data is designed to return meaningful results that relate to the test. It is useful for gaining an understanding of what the test does, and for demonstrating the test. The calculator's on-line help provides a description of what the example data represents. Getting started with the Inference aplet This example describes the Inference aplet's options and functionality by stepping you through an example using the example data for the Z-Test on 1 mean. Open the Inference aplet 1. Open the Inference aplet. Select Inference . The Inference aplet opens in the Symbolic view. Inference aplet 11-1