Casio STAT 2 Manuel d'utilisateur télécharger pdf (Page 48)

Activity 9

Rainbow of Fruit Flavors

Topic Area: Hypothesis Testing

NCTM Standards:

• Develop and evaluate inferences and predictions that are based on data

• Use simulations to explore the variability of sample statistics from a

known population and to construct sampling distributions (9-12)

• Understand how sample statistics reflect the values of population

parameters and use sampling distributions as the basis for informal

inference (9-12)

Objective

The students will be able to accept or reject a null hypothesis based on given data

and calculations of confidence.

Introduction

This activity should work well with the students because they get to have candy.

Only one rule: they have to count before they eat!

The students will need their own personal data as well as a full class set of data.

Have each student open their bag of Skittles

, count and record the number of

each color they have in a chart. After each student has finished counting, have

he/she share the data with the class. Make a class chart on the overhead, board,

or flip chart. Have them follow the directions on the student worksheet to com-

plete the activity.

The students should be familiar with the following vocabulary:

Sample Sample distribution

Population Mean

Parameters Inference

Confidence Z-test

Variables: Z, p, n

Getting Started

For this activity you will need the Casio fx-9750G Plus graphing calculator and

small bag of Skittles®. The students will perform a confidence test based on the

percentage of one color in the bag compared to the class percentage of the same

color.

Teaching Notes

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Casio STAT 2 Manuel d'utilisateur Page 48