Quiz 1

All data needs?

• numbers

• Context

• nothing

• friends

Quantitative data must be numbers.

• True

• False

Dividing sample into subgroups based on shared characteristics.

• Cluster sampling

• Systematic sampling

• Multi-step sampling

• Stratified sampling

Identifier variables _______ repeat.

Which is NOT a categorical variable?

• Gender

• Zip Code

• Number of pets

• Types of pets

What type of variable describes this picture?

• Ordinal

• identifier

• quantitative

• normative

For unimodal and symmetric distributions, you use:

• Median and IQR

• Median and range

• Mean and range

• Mean and IQR

Answer explanation

Mean and range are used to describe data that's not skewed.

Categorical variables are never numbers

• True

• False

Samples should be ____ the population

• nothing like

• exactly like

• convenient for

• representative of

Skew is determined by the direction of the_____.