Quantifying Enviromental Impacts

Question 1

What are the two types of data?

Answer 1

Quantitative and Qualitative

Question 2

What are the two types of quantitative data?

Answer 2

Continuous and Discrete

Question 3

What is continuous data?

Answer 3

Data which has an infinite number of possible values

Question 4

What is discrete data?

Answer 4

Data which deals with distinct values

Question 5

What are the two types of qualitative data?

Answer 5

Ordinal and nominal

Question 6

What is ordinal qualitative data?

Answer 6

Data that is non-numerical but has relative numerical values

Question 7

What is nominal qualitative data?

Answer 7

Data that is unordered, and distinct by name only

Question 8

How do we find the median?

Answer 8

1. Sorting the values in value order

2. Finding the middle number

Question 9

What is the position of the sample median for an ordered set of n values?

Answer 9

n+1/2

Question 10

What is the interquartile range?

Answer 10

75th percentile - 25th percentile

Question 11

What is the 50th percentile?

Answer 11

The median, the point at which 50% of the data lies below

Question 12

What data visualisation tool would you use to display continous data?

Answer 12

Histograms

Question 13

Describe a histogram

Answer 13

Simple useful way to display continous data
Partition data into distinct bins
Mean is the balancing point of a histogram

Question 14

Describe the relationship between the mean and the median if the data is right skewed

Answer 14

Mean > Median

Question 15

Describe the relationship between the mean and the median if the data is left skewed

Answer 15

Mean < Median😆

Question 16

What does the lower limit of the box in a box plot represent?

Answer 16

25th percentile, point at which 25% of the data lies below

Question 17

What does a quilt plot show?

Answer 17

Summarizes geo-referenced data

Question 18

Give some points to think about when constructing plots

Answer 18

• Consider if data is best displayed in a table
• Make it self-explanatory
• Choose a convient scale
• Include the origin

Question 19

Give some points to think about when constructing tables

Answer 19

• Arrange rows/columns in some natural order
• Provide a title and brief explanation of data displayed
• Consider splitting data into smaller tables
• Round appropriately