Descriptive statistics

Question 1

What do descriptive statistics do?

Answer 1

They provide a quick overview of the data and allow a simple description of the basic trends and patterns in the data
Makes data manageable

Question 2

What do inferential statistics do?

Answer 2

They allow conclusions to be drawn from the data

Question 3

What the 2 main categories of descriptive statistics?

Answer 3

Numerical and graphical

Question 4

What is graphical statistics?

Answer 4

Graphs

Question 5

What is numerical statistics?

Answer 5

Quantities

Question 6

What are the 2 types of variables?

Answer 6

Quantitative and qualitative

Question 7

What are the two types of quantitative variables?

Answer 7

Continuous and discrete

Question 8

What are the two types of qualitative variables?

Answer 8

Categorical and ordinal

Question 9

What are the 2 types of statistical indexes?

Answer 9

Measures of location and measures of variability

Question 10

What do measures of location do?

Answer 10

Capture the central tendency of the data set

Question 11

Give some examples of measures of location

Answer 11

Mean
Mode
Median

Question 12

What do measures of variability do?

Answer 12

Describe the spread of the data around the central tendency

Question 13

Give some examples of measures of variability

Answer 13

Standard deviation
Range
Interquartile range

Question 14

What are the 6 types of graphical summaries?

Answer 14

Bar charts
Histograms
Scatter plots 
Pie charts 
Box plots 
Time series plots

Question 15

What are the limits of graphical summaries?

Answer 15

Less effective when the number of variables is larger than 3

Question 16

What is the 5 number summary?

Answer 16

xmin
xmax
Q1
Q2
Q3