displaying data

Question 1

what’s a bar chart?

Answer 1

• used when you have discrete data
• bars don’t touch

Question 2

what are histograms?

Answer 2

• used when continuous data is grouped into intervals
• bars touch

Question 3

what are scatter graphs?

Answer 3

used when looking at correlations between co-variables

Question 4

what are line graphs?

Answer 4

used when an experiment produces continuous data (not grouped)

Question 5

describe the two types of distributions

Answer 5

normal distribution - mean, median and mode are the same (symmetric)
skewed distribution - (slanted) goes from mode, median to mean (highest to lowest)

Question 6

describe positive and negative skewed distributions

Answer 6

positive - goes down to the right
negative - goes down to the left