Inferential statistics: Self-test #1

State the null hypothesis for the following propositions. Click answer for popup message.

The incidence of depression is higher for men than for women. (answer)

On the playground, more children play on the swings than on the slide. (answer)

Women are more irritable in the premenstrual phase of their cycle than at other times. (answer)

A high score on the test of spatial ability predicts success as an electrician. (answer)

Here are some null hypotheses. What do you think the research hypothesis for each might be?

Preference rates for blue cars was the same as preference rates for green ones. (answer)

With regard to social behavior, any observed differences between cats and dogs are due to chance. (answer)

There are no racial differences in intelligence. (answer)

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