Classifying Data

A survey records the make of car a person drives.
State the type of data this is.

A survey records the number of pets a household owns.
State the type of data this is.

A survey records the mass of each parcel, in kilograms.
State the type of data this is.

A hotel asks guests to rate their stay as poor, fair, good or excellent.
State the type of data this is.

A cafe records the following for each order.
(a) The type of milk used (oat, soya, dairy).
(b) The temperature of the drink, in degrees Celsius.
(c) The number of items in the order.
(d) The size of the drink (small, regular, large).
Classify each type of data.

Explain the difference between discrete and continuous numerical data.

A vet records the breed of each dog, its weight in kilograms, and its aggression level as low, medium or high.
State which of these is ordinal categorical, and justify your answer.

An online survey is sent out by email to people on the electoral register who live in Renfrewshire.

The aim of the survey is to determine which political party people intend to vote for in an upcoming election.

The survey asks participants to answer the following questions:
- State your age in years.
- State your gender. Please select from: male, female, non-binary, other, prefer not to say.
- Which political party do you intend to vote for in the upcoming election?
- Did you vote in the last election? Please select from: yes, no, don't know, prefer not to say.
- If yes, state which political party you did vote for in the last election.

(a) State the type of data that best describes:
(i) age
(ii) gender.

The results of the online survey are to be used to predict the outcome of an upcoming national election.

(b) Give two reasons why these results do not provide a representative sample of the national population to allow the prediction to be accurate.