M5: Quiz (Review) Flashcards
An alternative hypothesis in which the researcher predicts the direction of the expected difference between the groups is:
One-tailed hypothesis
The smaller the p-value, the more likely that Ho is false, providing stronger support for refuting it and enhancing the probability of accepting Ha as correct.
True
4 Steps for Hypothesis testing
- State hypotheses
- Set decision criterion
- Collect data; compute sample statistics
- Make a decision
In reality, the null hypothesis may or may not be true, and a decision is made to reject or not to reject it on the basis of the data obtained from a sample.
True
The hypothesis predicting that there is no difference exist between the groups being compared is the ___ hypothesis.
null
An error in hypothesis testing in which the null hypothesis is rejected when it is true is:
Type I
When using a one-tailed hypothesis, the researcher predicts
the direction of the expected difference between the groups
When does a researcher risk a Type I error?
anytime Ho is rejected
Which of the following defines a Type II Error?
failing to reject a false null hypothesis
In hypothesis formulation, the default is the null hypothesis where any statistical significance is assumed to happen merely due to chance.
True
What is the correct decision in a hypothesis if the data produce a score that is in the critical region?
Reject Ho
The study of likelihood and uncertainty is to ___ and the process or determining whether a hypothesis is supported by the results of a research project is to ___.
probability; hypothesis testing
We always test a null hypothesis against an alternative.
True
The result of the statistical test says the level of significance is .06. By conventional statistical rules, our decision is:
we fail to reject the null hypothesis
A one-tail test of significance is associated with a:
directional hypothesis
