Skewness

Edexcel IAL S1 Representation of Data

-Identify the skew of a set of data

-Represent data in a Stem and Leaf Diagram

-Represent data in a Box Plot

-Construct and Read data from a Histogram

Think before you type!

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Multiple Choice

How do you think the salaries of adults in Dubai will be skewed?

• Positive

• Negative

• No Skew

Multiple Choice

How do you think the IQ of a random group of people will be skewed?

• Positive

• Negative

• No Skew

Multiple Choice

How do you think the heights of a random group of people will be skewed?

• Positive

• Negative

• No Skew

Multiple Choice

How do you think the age at which people retire will be skewed?

• Positive

• Negative

• No Skew

Skewness

Multiple Choice

Describe the skew

Mean= 55.48

Median= 56

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Mean= 5

Median= 4

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Mean= 5.71

Median= 5.72

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Mean= 3.2

Median= 3.5

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Mean= 8.91

Median= 8.78

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Q1= 8.5

Q2= 13

Q3= 21

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Q1= 3

Q2= 5

Q3= 6

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Q1= 3

Q2= 5

Q3= 8

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Q1= 6.6

Q2= 7.7

Q3= 8.8

• Positive

• Negative

• No Skew

Multiple Choice

Describe the skew

Q1= 4.7

Q2= 7.1

Q3= 7.3

• Positive

• Negative

• No Skew

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Multiple Choice

What is the mode?

• 4.7

• 3.6

• 4.05

Multiple Choice

What is the Skew?

• Positive

• Negative

• No Skew

Open Ended

Give a comparison between the two box plots

Multiple Choice

What are the two missing Frequency Densities?

• 4 and 1.2

• 0.25 and 1.2

• 40 and 6

• 4 and 12

Multiple Choice

What are the two missing Frequencies?

• 26 and 5

• 26 and 10

• 52 and 10

• 52 and 5

Multiple Choice

What are the frequencies of the bars from left to right?

• 15, 20, 40, 25

• 10, 30, 40, 55

• 15, 30, 40, 25

• 10, 20, 50, 25