That's Some "Mean" Weather

**Title: **That’s Some “Mean” Weather

**Grade: **7

**Math Topic: **Finding the mean, median, mode,
and range of a set of data.

**Credits: **Bonnie Manning, Wrens Middle, Jefferson
County

http://www.glc.k12.ga.us/BuilderV03/lptools/lpshared/lpdisplay.asp?Session_Stamp=&LPID=30983

**Brief
Description: **

Students use weather information to calculate the mean, median, mode, and
range. The lesson is to be done individually but would also work well with
small groups. It could be done in conjunction with a science lesson on weather.

**Technology & Materials Required:**

Student computers w/ Internet access & Microsoft Excel, LCD projector
(or other means to display computer screen), calculators

**QCC’s Addressed:**

Mathematics Problem Solving 2 Topic: Communication, Reasoning

Standard: Describes orally and in writing, using the appropriate mathematical
vocabulary, mathematical concepts and procedures, such as solving a word
problem or computing.

Statistics & Probability 42 Topic: Measures of Central Tendency and
Spread

Standard: Uses mean, median, and mode to describe central tendencies of a
data set, and uses range to describe spread of the data.

Technology Integration Basic Skills 4 Topic: Basic Skills

Standard: Operates basic technology tools and applications.

Problem solving/Decision Making 17 Topic: Problem Solving/Decision Making

Standard: Uses a variety of technology tools to solve problems.

**Procedures:**

Step 1:

Briefly review the meaning of mean, median, mode, and range. Lead students
in calculating the mean, median, mode, and range for a set of data(attached).

Attachments for Step 1

Title: Measures of Central Tendency FileName: Step 1 practice.doc

Description: This document contains the definition of mean, median, mode,
and range. It also gives data that can be used to explain how to calculate
each.

Step 2:

Students access www.weather.com on the Internet. They select four cities,
one at the time, and calculate the mean, median, mode, and range for the
daily high and low temperatures given in the 10-Day Forecast. After calculating
the central tendencies for each city, students answer questions about the
most appropriate choice in a given situation.(attachment)

Web Resources for Step 2

Title: The Weather Channel

URL: http://www.weather.com

Annotation: This site gives the ten-day forecast for any city in the United
States. Be sure students type a city and state in the box that tells them
to enter a city or US zip code. The ten day forecast will appear in the bottom
left-hand side of the screen.

Attachments for Step 2

Title: That's Some "Mean" Weather FileName: That's Some Mean Weather.doc

Description: This worksheet gives the students instructions for accessing
the Internet site and locating the ten-day forecast. They are then instructed
to choose four cities and calculate the mean, median, mode, and range for
the high and low temperatures of each city for the ten days.

Step 3:

Informal assessment

Attachments for Step 3

Title: Informal Assessment FileName: Weather Informal Assessment.doc

Description: The teacher observes students as they work, making note of the
points listed on the document and checking to be sure students have correctly
accessed the Internet site.

Step 4:

A peer evaluator is assigned to each student. He checks the student's work
for accuracy. Students then share the calculations for their particular
cities with their classmates. This is best done on transparencies. (Scrap
laminator film works great for this. It can be used and then discarded.)

Step 5:

Formal assessment.

Attachments for Step 5

Title: Assessment FileName: ASSESSMENT
& RUBRIC for weather.doc

Description: This is an open-ended assignment. Students are given the task
of explaining mean, median, mode, and range to a younger brother. A rubric
is included.