Casio STAT 2 Manuel d'utilisateur télécharger pdf (Page 24)

Activity 4

Spending Too Much

Topic Area: Non-linear Bivariate Data

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 bivariate measurement data, be able to display a scatterplot,

describe its shape, and determine regression coefficients, regression

equations, and correlation coefficients using technological tools (9-12)

Objective

The student will be able to plot bivariate data in a scatterplot, make conjectures

based on the plot, and create a regression equation using the graphing calculator.

Introduction

Introduce the problem to the students. This would be a good time to include

some real life issues with money in college (i.e. credit cards, living expenses).

The students should be familiar with the following vocabulary:

Univariate Bivariate

Regression Trend

Interpolation Extrapolation

y-Intercept Slope

R, R

values

The students are presented with an example that looks rather linear, but only

after further investigation can the students determine that the exponential

regression equation fits better (R

= 0.9969 for linear, R

= 0.9999 for exponential).

Getting Started

For this activity you will need the 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 24