0.17. Representing quantitative data

Question 1

What is a table for?

Answer 1

• usually already written for you to have to interpret the data, using the data to justify what it shows
• refer to both IVs (conditions) and the DV (measurement)

Question 2

What is a bar chart for?

Answer 2

• used to display a test of difference
• Y axis is the DV (measurement)
• X axis is the IV (2 conditions)
• 4 marks = title, IV labels, DV labelled, bars are accurate

Question 3

What is a scattergram for?

Answer 3

• used to display a relationship/ correlation
• variables plotted on the X and Y, plotted by an x
• no line is required- DO NOT JOIN UP OR DRAW LINE OF BEST FIT

Question 4

What is a histogram for?

Answer 4

• used for continuous data (interval data e.g. age time, temp)
• no gap, bars touch

Question 5

What is distribution for?

Answer 5

• used to represent how traits are represented in the population

Question 6

What is normal distribution?

Answer 6

• even curve
• Median, mean, mode-> close together

Question 7

What is positive skewed distribution?

Answer 7

• mean is larger than the mean and mode (hard test)
• mode, median, mean
• larger = further across x axis

Question 8

What is a negative skewed distribution?

Answer 8

• mean is smaller than the median and mode (easy test)
• mean, median, mode