How Close is Close?

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Statistics: Inferential Statistics

Level

9-12

Activity Time

60 Minutes

TI Calculator

TI-30X IIS

Other Materials

Stopwatch
3 X 5 index cards

Resource Types

Lessons

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How Close is Close?

Activity Overview

Students compute statistical measures like the mean, standard deviation, and variance of the data set. They understand how measures of variability can be interpreted.

Before the Activity

See the attached PDF file for detailed instructions for this activity

Print pages 132 - 134 from the attached PDF file for your class

During the Activity

Distribute the pages to the class.

Follow the activity procedures:

Start a stopwatch and stop it after 20 to 30 seconds have elapsed

Without looking at the watch, estimate and record the elapsed time

Compare the recorded times with the actual elapsed time

Determine the margin of error [no negative values]

Enter the error data in a stem and leaf plot

Find the average error

Determine the mean absolute deviation

Repeat the experiment and find the new average error

Understand that the new average error should be smaller than before due to experience in estimation

Compute the mean of the data

Calculate Standard Deviation and understand that it is another way of measuring the amount of variation about the mean in a data set

Repeat the calculation with other sets of data

After the Activity

Students complete the Student Activity pages.

Review student results

As a class, discuss questions that appeared to be more challenging

Re-teach concepts as necessary

Download Files

Download All Files (ZIP)

Before the Activity Files

Teacher Notes PDF

Author

Texas Instruments

Alignment

Standards Alignment

Textbook Alignment

Subject Area

Math: Statistics: Inferential Statistics

Level

9-12

Activity Time

60 Minutes

TI Calculator

TI-30X IIS

Other Materials

Stopwatch
3 X 5 index cards

Resource Types

Lessons

Report an Issue

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How Close is Close?

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