Week 1

Description

Psychology Quiz on Week 1, created by Katie Morbey on 19/05/2019.
Katie Morbey
Quiz by Katie Morbey, updated more than 1 year ago
Katie Morbey
Created by Katie Morbey over 5 years ago
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Resource summary

Question 1

Question
Why should you use an ANOVA, rather than lots of t tests?
Answer
  • Performing lots of t test increases the probability of making a Type 1 error
  • Performing lots of t tests increases the probability of making a Type 2 error
  • Performing lots of t tests increases the chance of failing to reject a false null hypothesis
  • All of the above

Question 2

Question
The ANOVA statistic is calculated by __________
Answer
  • Multiplying the between groups variance by the within groups variance
  • Subtracting the between groups variance from the within groups variance
  • Adding the between groups variance to the within groups variance
  • Dividing the between groups variance by the within groups variance

Question 3

Question
You calculate an F ratio and get a value more than 1. How would you interpret this?
Answer
  • There is the less between groups variance than within groups variance
  • There is the same amount of between groups variance and within groups variance
  • There is no within groups variance
  • There is more between groups variance than within groups variance

Question 4

Question
You have calculated the SSbetween as 10 and the SStotal as 15. What would the SSwithin be?
Answer
  • 25
  • 0.067
  • -5
  • 5

Question 5

Question
Your study has four conditions with 20 participants in each condition. What would the dfwithin be?
Answer
  • 77
  • 76
  • 79
  • 80

Question 6

Question
Which of the following is the correct way to calculate the MSbetween?
Answer
  • SSbetween ÷ dfbetween
  • SSbetween ÷ SStotal
  • SSbetween x dfbetween
  • SSbetween x dftotal

Question 7

Question
What does eta squared tell us?
Answer
  • If homogeneity has been established
  • If there is a significant difference between groups
  • How much of the variance in the independent variable can be accounted for by the dependent variable
  • How much of the variance in the dependent variable can be accounted for by the independent variable

Question 8

Question
If an author reports the results of an ANOVA as F (4, 65) = 9.56, p = .01, what is the between-groups degrees of freedom?
Answer
  • 5
  • 65
  • 9.56
  • 4
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