Exam vocab words chapter seven

Question 1

Null hypothesis

Answer 1

The hypothesis of equal population means. Any observed difference between samples is seen as a chance occurrence resulting from sampling error.

Question 2

Research hypothesis

Answer 2

The hypothesis that regards any observed difference between samples as reflecting a true population difference and not just sampling error.

Question 3

Level of Significance

Answer 3

A level of probability at which the null hypothesis can be rejected and the research hypothesis can be accepted.

Question 4

Sampling distribution of differences between means

Answer 4

A frequency distribution of a large number of differences between random sample means that have been drawn from a given population.

Question 5

Statistically significant difference

Answer 5

A sample difference that reflects a real population difference and not just sampling error.

Question 6

Critical values

Answer 6

The area in the tail(s) of a sampling distribution that dictates that the null hypothesis be rejected.