Task 2

Question 1

Levels of Measurement

Answer 1

Qualitative and Quantitative

Question 2

Qualitative (categorical)

Answer 2

• Nominal (naming) Mode
  —› Equal categories like male/female
• Ordinal (ordering) Median
  —› ordered categories like low/medium/high

Question 3

Quantitative

Answer 3

• Interval (distances) Mean
  —› meaningful numbers like IQ, the distance between units is always equally large
• Ratio (Rate (like interval with a zero)) Median

Question 4

Lvl of measurement and suitable graphs/tables

Answer 4

Qualitative: 
- Frequency Table 
- Graphs: Nominal —› Pie-/Bar-Chart
                 Ordinal —› Bar Chart
Quantitative: 
- Stem-and-leaf plot
- Histogram

Question 5

Mode

Answer 5

• Value that occurs most often
• Frequency of the scores
• influenced by outliers
• Every level of measurement
• preferred measure for central tendency

Question 6

Median

Answer 6

• Score that lies in the middle
• Frequency and order of scores
• If skewed distribution it is preferred —› resistant to outliers

Question 7

Mean

Answer 7

• Center of gravity of the score distribution
• Frequency, order and value of scores
• Add up all scores and divide by total amount