Correlations

Question 1

what tables are used for qualitative data

Answer 1

• raw data table
• frequency / tally chart
• summary of descriptive stats

Question 2

what is a bar chart

Answer 2

• nominal data shown in bars - height = frequency

Question 3

what is a pie chart

Answer 3

circle with sections proportional to frequency

Question 4

what is a scattergram

Answer 4

shows relationship between two variables
- correlations

Question 5

what is a histogram

Answer 5

shows continuous data -

Question 6

how do you show a correlation

Answer 6

scattergram

Question 7

how is a positive correlation shown

Answer 7

both co variables increase

Question 8

how is a negative correlation shown

Answer 8

both co variables decrease

Question 9

what is a correlation coefficient

Answer 9

strength of correlation measures between -1 and 1 could be 0.8 etc. - anything over 0 is positive

Question 10

correlation evaluation

Answer 10

• doesnt show causation
  + highlights causal relationships
  + useful tool in measuring strength of relationships