Exam 10: Introduction to Hypothesis Testing: Using the Sign Test

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained. The population to which these results apply is _________.

Define important size of effect.

In hypothesis testing it is incorrect to evaluate the probability of the specific outcome of the experiment.

If the alternative hypothesis states that alcohol affects short-term memory, the null hypothesis states _________.

If H 0 is true and we reject it, we have made a Type I error.

If a = 0.05 and chance alone is operating, it is reasonable to expect that on the average one would make one Type I error in every 20 experiments.

The probability of making a Type I error increases with independent replication.

If alpha equals 0.05 and the probability level of your experiment is 0.04, you would _________.

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained. The obtained probability = _________.

For any given obtained result, a one tail p-level is

What do we mean by "state of reality?"

If H₀ is true and you retain H₀ in your experiment you have made a Type II error.

In the repeated measures design, _________.

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained. The nondirectional alternative hypothesis is _________.

The sign test analyzes both the magnitude and direction of the data.

A psychologist is interested in whether hypnosis affects brain dominance. Twelve college students from the freshmen class are randomly sampled for an experiment. The experiment has two conditions which are given on different days. In condition 1, the students are hypnotized and then given a test which measures the relative dominance of the right and left hemispheres. The higher the score, the more dominant is the right hemisphere. In condition 2, the same students are given the test again, only this time they are not hypnotized but are in their normal state of consciousness. The following scores are obtained. Using a = 0.05 2 tail , your conclusion is _________.

The sign test ignores the magnitude of the difference scores.

It is always appropriate to use a directional alternative hypothesis.

In an experiment with a repeated measures design _________.

The sign test can be used for _________.