Education Technology

### Percentiles & Z-Scores

Students calculate percentiles, z-scores, and probabilities using normal distributions.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus

### t Distributions

Students compare the t distribution to the standard normal distribution and use the invT command to find critical values for a t distribution.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus

### Areas In Intervals

Students estimate and find a given area under a normal curve.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus

### Assessing Normalcy

Students use four criteria to determine if a data set is normal. They begin by looking at a histogram to determine if it is symmetric and bell-shaped.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus

### Is it Rare?

Students use the Poisson distribution to determine the probabilities for various numbers of hurricanes hitting the United States in a given year.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus

### Percentiles

Students use the area to the left of a value in a normal distribution to find its percentile and then reverse the process to find the value for a given percentile.
• TI-84 Plus CE
• TI-84 Plus C Silver Edition
• TI-84 Plus Silver Edition
• TI-84 Plus