Download free 90-day trial versions of the most popular TI software and handheld emulators.
Check out TI Rover activities that put math, science and coding in motion.
Customize your summit experience with sessions on math, STEM, coding and more.
April 10, 2011
Students test claims of whether given distributions "fit" theoretical distributions.
In Problem 1, students are introduced to the goodness-of-fit test and the test statistic. They also observe a graph and some may recognize the positively skewed chi square distribution. They can change the degrees of freedom and determine what large and small chi-square values would indicate.
Students investigate a scenario presented that tests a claim that every category has the same proportion. They will use the List Editor and the sum command to calculate the chi-square value and a Chi-Square distribution chart to find the critical value.
Finally, students will use the Shade command to calculate the P-value. At the end of this activity, students will be able to use a chi-squared test to test the hypothesis that an observed frequency distribution fits an expected frequency distribution.
© Copyright 1995-2018 Texas Instruments Incorporated. All rights reserved.