Exam 1

Question 1

What is a normal distribution

Answer 1

A theoretical frequency distribution with a mean,median and mode of 0.

Question 2

What is a percentile rank

Answer 2

percentage of scores less than or equal to a given score

Question 3

Nominal scale of measurement

Answer 3

categories with no numerical properties

Question 4

Ordinal scale of measurement

Answer 4

order to categories. First, Second, Third

Question 5

Interval scale of measurement

Answer 5

Does not have an absolute zero. On a scale, numbers mean something. Temperature can have negatives

Question 6

Ratio scale of measurement

Answer 6

absolute zero/absence of a substance. no negative numbers.

Question 7

When to use a z score statistic

Answer 7

compare scores that come from two separate distributions

Question 8

What are the goals of science

Answer 8

Describe, Predict and explain

Question 9

Goal of experimental research

Answer 9

to explain supports cause and effect

Question 10

Goal of observational research

Answer 10

to describe

Question 11

Goal of correlational research

Answer 11

to predict