## Reflection: Real World Applications Dispersion of Data (Day 2 0f 2) - Section 1: Partner Work

Some of the students really struggled with finding the variance and standard deviation of the military data set.  The large numbers made it tedious and some of the students were not patient enough to work through the process to get to the final answer.

Most students showed work, but again some did not get to the final answer.  The students that used tables and organized their steps seemed to be more successful.

The purpose of this lesson was not for students to find variance and standard deviation by hand, but yet have a deeper understanding of these two words when using the calculator.  I think by assigning students to calculations by hand before working the problems on the calculator provides a deeper conceptual understanding.

Also discussing with students that most of the data sets that we will work with is a sample of the population.  Rarely can you describe every individual in a whole population.

This lesson also showed students the importance and appropriate time to use technology.  Some students are not comfortable with technology, and this shows those students that there is a need for technology at times.

Real World Data and the Importance of Technology
Real World Applications: Real World Data and the Importance of Technology

# Dispersion of Data (Day 2 0f 2)

Unit 9: Statistics
Lesson 7 of 10

## Big Idea: To check the work of variance and standard deviation using a calculator, and be able to support the description with the math.

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Standards:
Subject(s):
univariate data, Math, Statistics, Sample Size, range, interquartile range, standard deviation, variance, Dispersion of data, Spread of Data, graphing calculator, ti, Self
50 minutes

### Rhonda Leichliter

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