PSY 309 Test 1

What do scientists call an explanation that organizes observations & predicts future behaviors?

• Hypothesis

• Theory

• Critical thinking

• Operational Definition

When studying the effects of cartoons on happiness, what's the null hypothesis?

• Cartoons increase happiness

• Cartoons decrease happiness

• Cartoons influence happiness

• Cartoons do not influence happiness

A specification of how a researcher measures a construct is known as a(n)

• Measurement

• Controlled variable

• Operational definition

• Hypothesis

Expecting Group A to be higher than Group B would be a:

• Two-tailed hypothesis

• One-tailed hypothesis

The arithmetic average of a distribution of scores is the

• Mean

• Middle

• Median

• Mode

The Berry's have five kids aged 2, 3, 4, 9, and 9. What is the median age?

The difference between the highest and lowest scores in a distribution is the:

• Sum of Squares

• Standard Deviation

• Variance

• Range

Standard deviation is the square root of:

• Variance

• Sum of squares

• Range

• Sum of errors

Which measure of central tendency is most appropriate for qualitative data?

• Mean

• Mode

• Median

• None, qualitative data doesn't use them

Which measure of central tendency is best for football players salary?

• Mean

• Median

• Mode