data analysis part 2 presentation of quantitative data

Question 1

what are bar charts used to show

Answer 1

frequency data for discrete variables. for example bar charts plot mean scores for conditions A and B separately

Question 2

what are histograms used to show

Answer 2

continuous data, there should be no space in the bars therefore

Question 3

what do scattergraphs show

Answer 3

the correlation or relationship between two sets of data by plotting dots to represent each pair of scores. it indicates the strength and direction of the correlation

Question 4

what is a normal distribution

Answer 4

arrangement of data that is symmetrical and forms a bell shaped pattern where the mean, median or mode falls in the centre at the highest peak

Question 5

what is a skewed distribution

Answer 5

where frequency data is not spread evenly and the data is clustered at one end.

Question 6

what is a positive skewed distribution

Answer 6

it has a long tail that extends to the right, the mean will be greater than the median

Question 7

what is a negative skewed distribution

Answer 7

it has a long tail that extends to the left, the median will be greater than the mean