Stat 101 - Chapter 1 - Part 2

Which of the following is a qualitative variable?

• Height of students

• Gender of students

• Number of children in a family

• 1. Age in years

A variable that can take on values like 0, 1, 2, 3 (countable) is called:

• Continuous variable

• Nominal variable

• Discrete variable

• Ratio variable

Body temperature measured in Celsius is an example of:

• Nominal scale

• Ordinal scale

• Interval scale

• Ratio scale

Which measurement scale has a true zero point?

• Nominal

• Ordinal

• Interval

• Ratio

A researcher wants to survey every 10th person entering a shopping mall. Which sampling method is this?

• Cluster sampling

• Systematic sampling

• Stratified sampling

• Convenience sampling

Dividing a population into groups (such as male/female) and then taking a random sample from each group is:

• Cluster sampling

• Stratified sampling

• Systematic sampling

• Judgment sampling

Selecting certain schools in a city at random, then surveying all students in those schools is an example of:

• Cluster sampling

• Stratified sampling

• Simple random sampling

• Convenience sampling

A study where the researcher just observes and does not interfere is called:

• Experimental study

• Observational study

• Stratified study

• Controlled study

In an experiment testing the effect of a new drug on recovery time, the drug dosage is the:

• Dependent variable

• Confounding variable

• Independent variable

• Constant variable

A researcher finds that ice cream sales and shark attacks both increase in summer. The outside factor “temperature” is an example of:

• Independent variable

• Confounding variable

• Dependent variable

• 10. Ratio variable