1.3 Practice Questions: Basic and Descriptive Stats (1-2)

What type of data is this considered: histograms?

quantitative

What type of data is this considered: steps?

quantitative

What type of data is this considered: bar graphs?

qualitative

What type of data is this considered: social security number?

qualitative

What type of data is this considered: letter grade?

quantitative

What type of data is this considered: shoe size?

quantitative

What type of data is this considered: eye color?

qualitative

What type of data is this considered: softness of skin?

qualitative

What does the coefficient of determination tell you?

the increases in prediction accuracy

If r increases, what happens to the coefficient of determination (r squared)?

It increases.

If H0 for a correlation is false..?

there is a correlation and "rho" does not equal 0

Whats the difference between the parameter (μ) and the sample statistic (M)?

sampling error

If the average WU SAT is 510, why might I get M=521.3 for 10 WU students?

sampling error

We typical use _____ to estimate ______ in inferential research.

Statistics; Parameters

When we compare two sample means to see if they're significantly different, we're asking if the ____ actually differ.

μ's (the population means)

If an intervention creates a difference between the population means of the two groups, then there's a ________________

Treatment effect

If there's a difference between the sample means but the population means don't different, then we're just seeing _____________

Sampling error

How would height be classified?

ratio

How would olympic medals be classified?

ordinal

How would gender be classified?

nominal

How would time be classifed?

Ratio