Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors.
Download free 90-day trial versions of the most popular TI software and handheld emulators.
Bring a new dimension of learning to your classroom with activities that put math in motion.
Explore teaching strategies to help students succeed on the SAT® and ACT® math tests using TI technology.
Drive deeper, more relevant understanding of science in middle grades and high school.
Students find z-scores and critical values to test claims about proportions.
In Problem 1, students begin hypothesis testing. They write null and alternative hypotheses for a two-tailed test. They test the claim that 10% of Americans are left-handed.
Students then calculate the critical values. They will determine that because the normal distribution is symmetric, they can find the left critical value using the Inverse Normal (invNorm) command. and use its opposite for the right critical value.
Students discuss whether to reject or fail to reject the null hypothesis based on the test statistic and the critical values.
© Copyright 1995-2019 Texas Instruments Incorporated. All rights reserved.