Chapter 3 - Representations of data

Question 1

What is an outlier?

Answer 1

An extreme value

Question 2

What are the two equations for outliers?

Answer 2

Q3 + k(IQR)

Q1 - k(IQR)

Question 3

Where do you draw the whisker to on a box plot?

Answer 3

To the largest acceptable value, with an x four any outliers

Question 4

What does it mean to clean data?

Answer 4

To remove anomalies

Question 5

How should you describe box plots?

Answer 5

Describe the range (e.g. IQR) and location (e.g. median)

Question 6

When you draw a cumulative frequency chart, where should you draw at?

Answer 6

The highest value in the group

Question 7

How do you draw a frequency polygon?

Answer 7

Join the middle of the tops of each bar on a histogram

Question 8

What is the area of the bar on a histogram proportional to?

Answer 8

The frequency of each class

Question 9

How do you calculate the height of a bar on a histogram?

Answer 9

Use k x frequency

Question 10

If k = 1, how do you calculate frequency density?

Answer 10

Frequency / class width