Casio STAT 2 Manuel d'utilisateur télécharger pdf (Page 12)

Activity 2

World Cocoa Market

Topic Area: Two-variable Statistics

NCTM Standards:

• Formulate questions that can be addressed with data and collect, organize,

and display relevant data to answer them

• Understand the meaning of measurement data and categorical data, of

univariate and bivariate data, and of the term variable (9-12)

• Understand histograms, parallel box plots, and scatterplots and use

them to display data (9-12)

• Compute basic statistics and understand the distinction between a

statistic and a parameter (9-12)

• Select and use appropriate statistical methods to analyze data

• Find, use, and interpret measures of center and spread, including mean

and interquartile range (6-8)

• For univariate measurement data, be able to display the distribution,

describe its shape, and select and calculate summary statistics (9-12)

Objective

The student will be able to calculate summary statistics for two sets of data

simultaneously, make conjectures based on these statistics, and display the

results in parallel box plots.

Introduction

You can make this more dramatic by drinking a cup of hot chocolate in front of

the room. This will probably only work if you do not drink coffee or some other

beverage in front of your class on a regular basis. You could also have a few

packets of cocoa mix and pass around to your class. Ask them how much cocoa

they think the world uses in a given year. You could also use the following to help

engage your students in the activity.

"Everyone likes a nice cup of hot chocolate or some brownies. To make both of

those you need cocoa. As you sip a cup of hot chocolate you begin to wonder how

much cocoa is used in the world today. You could go on a search and find a

website that gives world cocoa market statistics."

The students should be familiar with the following vocabulary:

Univariate Conjecture

Mean Mode

Median Parallel box-and-whisker plots

Ratio Standard deviation of sample

Bivariate Standard deviation of population

Teaching Notes

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Casio STAT 2 Manuel d'utilisateur Page 12