Workshop 1 - Data

Question 1

Categorical data

Answer 1

Data can be grouped by category but cannot be measured, counted or sorted

Question 2

Ordinal data

Answer 2

Categorical data but can be ordered

Question 3

Discrete data

Answer 3

Whole numbers where the quantity is meaningful

Question 4

Whiskers

Answer 4

All data except outliers:
Lower end: Q(L) -1.5IQR
Upper end: Q(U)+1.5IQR

Question 5

Outliers

Answer 5

Extreme value points
Any points not between the whiskers

Question 6

Range

Answer 6

Extent of data
Max value - min value

Question 7

Continuous data

Answer 7

Any number where the quantity is meaningful

Question 8

Density histogram

Answer 8

Sum of column areas is 1

Question 9

Mode

Answer 9

Value that appears most often

Question 10

Data skewed to left (negative skew)

Answer 10

Median < mean
Often mode < median

Question 11

Data skewed to left (negative skew)

Answer 11

Mean < median
Often median < mode