Answer the following multiple choice questions:
1 Niamh wanted to test a theory that older students preferred a different type of music to younger students.She chose the youngest person from each Year 7 class and the oldest person from each Year 12 class to answer her questions. What type of sample is this?
A random
B stratified
C systematic
D census

2 A motoring organisation did a survey of the number of breakdowns experienced by motorists over a month.
This data is?
A categorical
B quantitative continuous
C quantitative discrete
D none of these

3 A jar is filled with identical white buttons. Mandy tips the buttons into a bowl adds 30 more buttons,
identical except that they are red, and mixes them together. Mandy then randomly selects a handful of
buttons and finds she has 18 buttons, 4 of which are red. How many white buttons should Mandy estimate were originally in the jar?
A 105
B 135
C 165
D 545

4 30% of a country's population is aged over 60. How many people aged over 60 should be included in a sample of 250 people?
A30
(B) 50
C 60
D 75

Which is not a valid step in the process of statistical inquiry?
A fabricating data
B organising data
C summarising data
D Analysing data

6 Which is not quantitative data
A values of cards chosen from a standard pack
B weights of children
C population of flying foxes in a colony
D number of visitors are to a theme park

7 Which type of questions should be included in an effective questionnaire?
A Biased questions
B Ambiguous questions
C Long-winded complicated questions
D Clear and concise questions