**DATA**

**MANAGEMENT**

Learning Goal

We are learning to collect and organize data and display the data using a variety of graphs.

When I say Data Management what do you think of?

Circle Graphs:

a graph which represents a whole divided into sectors.

Your Task!

1. Organize a set of data based on a survey we do in class.

2. Create a circle graph to display the information

But First...

Let's take a quick survey!

What hair color does everyone have in the class?

Now it's your turn! Here are your instructions!

Step 1

Step 2

When you're finished, turn over to the other side!

One last thing to find the percentage of category for your circle graph follow these steps:

1. Add the amount of responses together to find the total.

2. Take each individual category amount and divide by the total.

3. Multiply the number by 100 and this is the %.

Homework

Census and Samples!

Population:

When we are collecting data, we have to decide the amount of people we want to survey that will give us an accurate response. Are we going to take a

census

or a

sample

?

Entire group of people

Census

Where may you have heard this word before?

Survey of a population.

Census

Sample

A small group that represents a population.

Bias vs. Unbias in Math

Biased:

sample that is too small or a sample that favours one group or opinion over another.

ex: asking Drake fans if they like rap music.

Unbiased/Reliable

Random selection of a group.

e.g., asking 8C student's if they like rap music.

The goal is to make your target group as unbiased as possible.

Video Time

Time to play...

sample, census, bias, unbias,

P 189

Homework:

create your own examples to explain

- census

- sample

- math bias and unbias

Inferring with Data

Inference:

using data to make a prediction or form an opinion

Time to get our inferencing on!

http://www.bhamcityschools.org/cms/lib5/AL01001646/Centricity/Domain/5481/English%20Language%20Arts%205th%20Grade/Week%201-%20Grade%205%20English%20Language%20Arts%20%20INFERENCE%20RIDDLES%20Powerpoint.pdf

From Toronto Police...what are some things you expect to find?

with some data

The Wonderful World of Data!

Circle Graph

* displays data that is divided into parts of a whole (100%)

line graph

* displays data that changes over time

Bar Graph

* displays data that can be counted

double bar graph

* displays two sets of data that can be counted

scatter line plot

y-axis

x-axis

* displays two related sets of data that are measured or counted

Your mission for today:

Work on page 200 in your textbook. Do the third and fourth instructions: "identify the graph" and "match each graph".

Homework

Page 203 # 5

"Analysis of Data" Handout

https://www.flocabulary.com/statistics/

Mean:

add the numbers together, divide by the amount of numbers

Median:

the middle number when numbers are arranged in order (least to greatest)

Mode:

the number that shows up the most

Outlier:

a # in a data set that is significantly off from the others.

Central Tendency

Math Test Marks:

2, 46, 52, 52, 52, 60, 63, 64, 65, 71,

73, 74, 75, 75, 76, 76, 77, 79, 79, 100

Find the mean, median, mode and outlier.

Homework

Everything we do....we do it for the gram!

Today's Rule...

#HISTOGRAM THAT IS!

So...what are histograms?

a connected bar graph that shows data organized into intervals,

has no spaces between the bars

usually has a minimum of 5 bars.

Homework

P.218 1 and 4

Well, kinda! #pennymath