Math 1 Unit 6 Statistics Day 1

Math 1 Unit 6 Statistics

by Darla Jones

​Old Vocabulary

​Mean- the average of your data set

​

​Median- the middle number when data set ordered from least to greatest

​

​Mode- the number occuring the most often in the data set

​

​Range- the difference of the largest and smallest number in the data set

​

​IQR- the difference of the third and first quartiles

Range and Interquartile Range Formulas

Range = Maximum # - Minimum #

(Upper Extreme - Lower Extreme)

Interquartile Range (IQR) = Q3 -Q1

Multiple Choice

Find the mean of the numbers below:

4, 9, 7, 10, 5

• 5

• 6

• 7

• 8

Multiple Choice

Find the median of these numbers:
76, 82, 57, 93, 64, 72

• 74
• 57
• 72
• 73

Multiple Choice

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the MODE.

12,10,10,10,13,12,11,13,10

• 10

• 12

• 10 and 12

• No Mode

What a Box and Whisker Plot look like?

Get it!!!

What does a Box and Whisker Plot includes?

Other Names:

Lower Extreme = Least Value = Minimum

Lower Quartile = First Quartile = Q1

Median = Q2

Upper Quartile = Third Quartile = Q3

Upper Extreme = Greatest Value = Maximum

Each section is worth 25%.

It does not matter if each section are not the same size.

​With Desmos!

​Enter data- A=[2,3,4,5,6,7,4,5,3,6,7,2,8,9] (must use capital letter, =, and [ ])

​Go to next empty cell

Click Desmos keyboard

​Click Functions

​Click Dist

​Click boxplot and enter your capital letter in the parentheses (boxplot (A))

​With Desmos!

​Enter data- A=[2,3,4,5,6,7,4,5,3,6,7,2,8,9] (must use capital letter, =, and [ ])

​Go to next empty cell

Click Desmos keyboard

​Click Functions

​Click Stats

​Click stats and enter your capital letter in the parentheses (stats (A))

Example: Find 5 Number Summary

Find the 5 Number Summary for the following data set.

{8,6,3,5,3,4,2,9}

​

​Also list Mean, IQR, and Range.

Multiple Choice

Which has a Median of 1?

• Zach 
• Steven 
• They both have a median on 1

Multiple Choice

Which city has skewed right spread?

• Millersburg

• Arcadia

Multiple Choice

Which has a larger IQR?

• Zach
• Steven
• They have the same IQR

Multiple Choice

What is the Interquartile Range of this data set? The lower (first) quartile is 19 and the upper (3rd) quartile is 56.

• 75

• 37

• 72

Multiple Choice

Which plot has a median of 50?

• Plot 1

• Plot 2

• Plot 3

• Plot 4

Multiple Choice

Which of the following lists all parts of the five number summary?

• Mean, Median, Mode, Range, and Total

• Minimum, Quartile 1, Median, Quartile 3, and Maximum

• Smallest, Q1, Q2, Q3, and Q4

• Minimum, Maximum, Range, Mean, and Median

Multiple Choice

Range is

• the difference between the third quartile and the first quartile

• the difference between the greatest and least data values.

Dot Plots

Each dot represents one answer. In the sheet to the right, 3 students answered that they had 0 cookies at lunch. 5 said they had 2 cookies.

​With Desmos!

​Enter data- A=[2,3,4,5,6,7,4,5,3,6,7,2,8,9] (must use capital letter, =, and [ ])

​Go to next empty cell

Click Desmos keyboard

​Click Functions

​Click Dist

​Click dotplot and enter your capital letter in the parentheses (dotplot (A))

Outlier

If there is a number far from the normal set, we call that the outlier.

1,10,12,15,16

Our outlier is 1

Multiple Choice

What is the outlier for this data?

• 90

• 96

• 102

• 108

Shape of a dot plot graph

Normal is like a camel hump or an upside down U.

Multiple Choice

Are these dot plots symmetric?

• Yes
• No

Skewed Right

Think of it like a tail. The if the numbers decrease on the right side of a graph, the tail goes to the right, and the graph is skewed right.

Skewed Left

Our tail trails to the left, like a dinosaur. We say that these graphs are skewed left.

HISTOGRAM

Graph that displays the data by using vertical bars of various heights to represent the frequencies of the classes.

Multiple Choice

A histogram shows numerical data and has bars that touch.

• True

• False

​With Desmos!

​Enter data- A=[2,3,4,5,6,7,4,5,3,6,7,2,8,9] (must use capital letter, =, and [ ])

​Go to next empty cell

Click Desmos keyboard

​Click Functions

​Click Dist

​Click histogram and enter your capital letter in the parentheses (histogram(A))

Multiple Choice

During which 3 month interval were the most houses sold?

• Jan - Mar

• Apr - Jun

• Jul - Sep

• Oct - Dec

Multiple Choice

Which of the statements below is true?

• Exactly half of the homes were sold between Jan - Jun

• There were more two story than one story homes sold

• 14.5 homes were sold in Apr - Jun

• More homes were sold in the first half of the year than the second.

Multiple Choice

Which age group represents the mode?

• 40-49

• 50-59

• 60-69

• 70-79

• 80-89

Multiple Choice

How many students were greater than or equal to 60 inches tall?

• 21
• 11
• 17
• 6

Multiple Choice

Which interval has 400 employees?

• 0 - 10

• 33 - 43

• 77 - 87

• 66 - 76

Multiple Select

Histograms (Select all that apply)

• Bar-style data display showing frequency of data measured over intervals.

• Each interval width must be the same width.

• Discrete data

• Used for large sets of data

• No need for a title and labels