hrm stats ch 7

hypothesis testing

A method for testing a claim or hypothesis about a parameter in a population, using data measured in a sample, is called ______.

mean academic performance will increase

A researcher believes that increasing attention given to children will improve mean academic performance. Therefore, the alternative hypothesis should be ______.

Reject the null hypothesis; IQ scores in this sample are significantly higher than those in the population.

A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and standard deviation of 12. She determines that the mean IQ in this sample is 104. Assuming she computes a one-sample z test at a .05 level of significance, what is the decision for a two-tailed test?

False

An effect size of d = 0.68 is a large effect in the population.

True

As sample size increases, the power to detect an effect increases.

False

Following the steps to hypothesis testing allows researchers to make decisions about parameters in a sample using statistics measured in a population.

all the above: p < .05 the decision is to reject the null hypothesis the value of the test statistic is larger than the critical value

If the value of the test statistic is in the rejection region, then ______.

all the above: is based on a probability depends on the level of significance for a hypothesis test can be to retain or reject the null hypothesis

In hypothesis testing, a researcher's decision ______.

True

The level of significance in hypothesis testing in the behavioral sciences is typically set at .05.

retain or reject the null hypothesis

What are the two decisions that researchers can make in hypothesis testing?

identify hypothetical data

Which of the following is not one of the four steps to hypothesis testing?

True

Rejecting a true null hypothesis is a Type I error.

True

The alpha level is the likelihood of committing a Type I error

False

The alpha level must be split into each tail for a directional hypothesis test.

level of significance (alpha)

The criterion for a decision regarding the value stated in a null hypothesis is set by the ______.