The term refers to the function of a Texas Instruments TI-84 series graphing calculator used to conduct a paired samples t-test. This statistical test determines if there is a significant difference between the means of two related groups. An example would be to assess the effectiveness of a weight-loss program by comparing the weight of individuals before and after the program. The calculator simplifies the complex calculations required for this test.
The utility of this function on the TI-84 streamlines statistical analysis for students and professionals alike. By automating the calculation of the t-statistic and p-value, it reduces the likelihood of computational errors and saves time. Its inclusion on a widely accessible calculator promotes a deeper understanding of hypothesis testing and statistical inference, fostering data-driven decision-making in various fields. Previously, these calculations were performed manually or required dedicated statistical software.