Basic Statistics Chapter 1 and 2

What is the primary purpose of statistics?

• Conducting surveys

• Collecting and analyzing data

• Measuring physical quantities

• Recording historical events

Which of the following is an example of primary data?

• Census records

• Hospital registry

• Data collected from a survey

• Government reports

Which of the following is a characteristic of nominal data?

• It has a meaningful zero

• The data can be ranked

• It consists of labels or categories

• It can be added and subtracted

Which level of measurement includes a meaningful zero?

• Nominal

• Ordinal

• Interval

• Ratio

What type of variable is 'eye color'?

• Nominal

• Ordinal

• Interval

• Ratio

Which type of data consists of numbers that represent counts or measurements?

• Categorical

• Qualitative

• Quantitative

• Nominal

What type of data is represented by the rating scale 'Satisfied, Neutral, Dissatisfied'?

• Nominal

• Ordinal

• Interval

• Ratio

What is an observational study?

• A study where researchers apply treatments

• A study where researchers measure characteristics without modifying them

• A study that only uses surveys

• A study that includes only experiments

What is a retrospective study?

• A study that collects data in the future

• A study that collects data from past records

• A study that involves an experiment

• A study that only uses surveys

Which of the following is a key difference between an observational study and an experiment?

• Observational studies involve treatments

• Experiments involve manipulating variables

• Observational studies include random assignments

• Experiments use only survey data