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Chapter 11 Data

Monday 12/3 - Acuity

Tuesday 12/4 – Acuity

Wednesday 12/5 SubThursday 12/6 – Notes

Friday 12/7 – Notes/ Exit Ticket

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Central Tendencies pg 53

Mean: is the average, which is the _____of the data divided by thenumber of items.

Median: is the __________ value when data is arranged innumerical order. If there is an even number of data items, themedian is the mean of the two middles.

Mode: the data item that occurs the most or greatest frequently.

Range: describes the difference between the greatest and the leastvalues. You find the range by subtracting the ______ value from the

greatest value.

Outlier: is a data item that is much ________ or lower than theother items.

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Samples and Surveys pg 550

Population is a _______ of objects or people

Sample is _________of the population

Random sampling when each member of a

population has the same _______ of beingselected.

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Find the MMMR for the following. Are

there any outliers?

5, 10, 18, 3, 6, 35

Mean,

MedianMode

Range

Outliers?

6, 9, 12, 15, 1, 3, 7

Mean

MedianMode

Range

Outliers?

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Frequency Table pg 532

Is a table that lists each item in a data set and

the number of times each item occurs.

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Line Plot/ Dot Plot pg 533

A line plot is a graph that

shows the shape of data set

by stacking x’s above each

data value on a number line.

Hint: sometimes an x can

represent more than just one

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Stem and Leaf Plots pg 544

A stem and leaf plot is a graph that uses digits of anumber. The stem is the digits on the left (tensplace) and the leaf are the digit(s) on the right (ones

place).

What was the data items for this stem and leaf plot

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Bar Graph pg 539

Shows the frequency of data using bars.

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Histogram pg 533

Is like a bar graph with no spaces between the

bars. The y axis/side is the frequency of the

given data.

How many cherry trees are there all together?

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Circle Graph pg 354

Each part of the circle graph represents the data

in percentage; the whole graphing adding up tobe 100%

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How to use circle graphs

Total * percentage (as a decimal)= amount of 

circle graph

Percentage to a decimal move the decimal 2 <

50% of our $5,500 monthly budget is spent on

food. How much are we spending on food?

5,500 * .5 =

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Circle graph

How to find the percentage of a pie graph.

Amount you are wanting to find

divided by total

will give you a decimal

then convert into a percentage.

Decimal to % move decimal 2 places to the >

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Line Graph pg 539 (chapter 9)

A comparison of data over time. By graphing using the (x, y) the

(horizontal, vertical)

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Box and Whisker Plots pg 58

Steps

1. Order numbers from least to greatest.

2. Find the median of the data.

3. Find the median of the lower half (first part of the data)

4. Find the median of the upper half (second part of the data).

5. Find the least and greatest number of your data.

6. Plot on the number line. Creating the box and whiskers.

S l 567

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Scatter plots pg 567A scatter plot is like graphing an (x, y) and you

compare two sets of data.

Trends: Positive goes up, negative goes down

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Exit Ticket 12/7

Order the following numbers.

Then find the mean, median, mode, range, and

if there are any outliers.

Then create a line graph.

Data: 6, 12, 24, 9, 10, 9, 12, 3, 9

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Exit Ticket 12/7 Answers

Mean is 10.4

Mode is 9

Median is 9Range is 21

There is an outlier of 24 because all other

numbers are within 9 digits of each other.

B ll W k 12/ 12

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Bell Work 12/ 12Have to do before finishing packet

Label the type of each graph.