Quiz 1 (statistics)

A researcher rates subjects for stress on a scale of 0 to 10. What is the level of measurement?

• Ratio

• Ordinal

• Nominal

• Interval

Which of the following is a measure of central tendency?

• Mode

• Correlation coefficiant

• P-value

• Confidence interval

What is the median?

• The value that divides a distribution exactly in half

• The difference between the lowest and highest value in a distribution

• The value that occurs most often in a distribution

• An average calculated by summing all the values in a distribution, and then dividing by the number of values in the distribution.

The mode is the most appropriate measure of central tendency for which one of the following levels of measurement?

• Nominal.

• Interval.

• Radio.

• Ordinal.

How many modes are there in this set of data: 2, 2, 3, 3, 3, 4, 5, 6, 6, 6, 7, 7, 8, 8

• Two

• None

• Seven

• One

A researcher is looking at the effect of heat upon the ability to recall items in a list. What is the dependent variable?

• The ability to recall items in a list.

• The control group.

• The varying level of heat.

• The size of the study sample.

A researcher is interested in the effects of loud music on learning. A group of 30 students is selected to participate in a research study. The group of students is...?

• The sample.

• The independent variable.

• The standard deviation.

• The population.

You are interested in whether Republican or Democratic voters are more likely to be able to swim. You have two categories, swimmer and non-swimmer, and you allocate the Republicans and Democrats in your sample accordingly. What's your level of measurement?

• Nominal.

• Interval.

• Ratio.

• Ordinal.

If you score 76, 85, 97, and 82 on your math tests, what would your average score be? 

• 80

• 92

• 85

• 88

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode:12, 10, 10, 10, 13, 12, 11, 13, 10

• 13

• 11

• 12

• 10