Hypothesis Testing
Psychology ⇒ Research Methods in Psychology
Hypothesis Testing starts at 11 and continues till grade 12.
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See sample questions for grade 12
A psychologist sets alpha at 0.05. What does this mean in terms of risk of error?
A psychologist tests whether a new therapy reduces anxiety. The null hypothesis states there is no effect. If the test statistic falls in the critical region, what should the psychologist do?
A researcher conducts a two-tailed test with alpha = 0.05. What is the probability of making a Type I error?
A researcher predicts that students who sleep at least 8 hours will score higher on a memory test than those who sleep less. What is the null hypothesis for this study?
A study tests whether a new teaching method improves test scores. The mean score for the control group is 70, and for the experimental group is 75. If the difference is statistically significant, what does this mean?
Explain why it is not possible to prove the null hypothesis is true in hypothesis testing.
If a test has low power, what does this mean about its ability to detect an effect?
What does the significance level (alpha) represent in hypothesis testing?
What is a Type II error in hypothesis testing?
What is meant by the 'power' of a statistical test?
What is meant by the term 'statistical significance'?
What is the main difference between a one-tailed and a two-tailed hypothesis test?
What is the main purpose of hypothesis testing in psychological research?
What is the relationship between Type I and Type II errors?
