Visualising Data and Types of Data Plot

Question 1

What are the 4 main types of data plots?

Answer 1

• Histogram
• Box plot
• Scatter plot
• Data summary

Question 2

What are the 2 types of Histograms?

Answer 2

1) Frequency Histogram
2) Proportion Histogram

Question 3

How do you inspect data from Histograms?

Answer 3

• Are there any odd-looking scores?
• What is the mode?
• How are the scores spread out?
• How is the data distributed?

Question 4

How do you inspect data from Box Plots?

Answer 4

1) Arrange scores in ascending order

2) Middle number = Median

3) Find the upper and lower quartile (basically find the midpoint between the smallest number and median + the biggest number and median)

4) Find H-spread = Upper q - Lower q

5) Find inner fences
a. Lower hinge - (1.5 x H spread)
b. Upper hinge + (1.5 x H spread)

6) Find the lowest and highest values falling WITHIN the inner fence

Question 5

How do you inspect data from Scatter Plots?

Answer 5

• Can spot the correlation when you plot the graph
• Can also find an anomaly

Question 6

How do you inspect data from a Categorial Data Summary?

Answer 6

• Find the standard deviation (SD in this case is shown as an ‘I’ line/Dog bone line and the midpoint of that line is the mean value)
• SD tells us how much variability there is in each category

Question 7

How do you inspect data from a Numerical Data Summary?

Answer 7

• Plot the data
• When you plot and draw a line of best fit, you can predict potential results by looking at the patterns

Question 8

What allows us to characterise/summarise our data?

Answer 8

Descriptive statistics

Question 9

What are Descriptive statistics?

Answer 9

Stats that allow us to characterise/summarise our data?

Question 10

What allows us to summarise/measure the typical scores in data?

Answer 10

Mean, Median, Mode

Question 11

What is the role of Mean, Median, Mode?

Answer 11

Allows us to summarise/measure the typical scores in data

Question 12

What allows us to summarise/measure the spread/variability in data

Answer 12

Range, Standard Deviation, Variance

Question 13

What is the role of Range, Standard Deviation, Variance?

Answer 13

Allow us to summarise/measure the spread/variability in data

Question 14

Which plot type provides a visual representation of the median, as well as providing an indication of the spread in your dataset and flagging potential outliers?

a.	A data summary plot

b.	A histogram

c.	A scatter plot

d.	A box plot

Answer 14

D

Question 15

Which plot type is best for providing a preliminary summary of your dataset on a single variable, allowing you to easily see the shape, spread and mode of your data?

a.	A scatter plot

b.	A histogram

c.	A data summary plot

d.	A box plot

Answer 15

B

Question 16

Which plot type would be best when trying to assess whether there is a relationship between 2 variables?

a.	A data summary plot

b.	A scatter plot

c.	A histogram

d.	A box plot

Answer 16

B

Question 17

Which plot type is best suited to illustrate the effect of a manipulating an independent variable on a dependent variable in an experimental design?

a.	A box plot

b.	A scatter plot

c.	A histogram

d.	A data summary plot

Answer 17

D