Casio STAT 2 Manuel d'utilisateur télécharger pdf (Page 43)

Activity 8

Grade Distribution

Topic Area: Normal Probability

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 determine if a set of data is normal and determine

the skew of the data using a normal probability plot.

Introduction

The students will use sample end of the year grade data to explore normal

probability in a histogram and normal probability plot. If your students do not

have experience with normal probability plots, you may want to review with

them that it will be linear if the data is normal. If it is not normal and it is skewed

to one side, the data will show a steeper slope either above or below the axis. If

the steeper slope is below the axis, it is right-skewed, and if it is above the axis, it

is left-skewed.

The students should be familiar with the following vocabulary:

Sample

Histogram

Normal probability

Normal probability plot

Conjecture

Population

Getting Started

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

the sample set of data. The students are using the sample data given.

Teaching Notes

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Casio STAT 2 Manuel d'utilisateur Page 43