Education Technology

The t-test

Students will practice t-test calculations using technology, just as they will be required to do so during examinations.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Chi-Square Tests

In this activity, students will look at a problem situation that involves categorical data and will determine which is the appropriate chi-square test to use.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Contingency Tables and Chi-Square

This lesson involves deriving and interpreting the chi-square as an indication of whether two variables in a population are independent or associated.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Difference in Means

This activity involves investigating whether a difference really seems to exist between two sample means.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS

Meaning of Alpha

• Students will recognize that the alpha value (significance level of a test) is the relative frequency for sample statistic values that lead to a "reject the null" conclusion, given that the null hypothesis is actually true.
• Students will recognize that a sample mean can lead to a "reject the null" or "fail to reject the null" depending on the alpha level.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

Meaning of Power

In this lesson, samples are generated from a population for a particular hypothesis test, leading to the conjecture that the null hypothesis is actually false.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

Resampling

This lesson involves approximate sampling distributions obtained from simulations based directly on a single sample. The focus of the lesson is on conducting hypothesis tests in situations for which the conditions of more traditional methods are not met.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS

Type 2 Error

This activity allows students to experiment with different alpha levels and alternative hypotheses to investigate the relationship among types of error and power.
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™
• TI-Nspire™ CAS