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Research Methods IV - Week 2 Between Subjects ANOVA

Brage Haavik 10 questions 5.0 (9 ratings)

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Questions in this quiz (10)

  1. 1Why should you use an ANOVA rather than a lot of T-tests?
    1. APerforming lots of t-tests increases the probability of making a Type 1 error
    2. BPerforming lots of t-tests increases the probability of making a Type 2 error
    3. CPerforming lots of t-tests increases the chance of failing to reject a false null hypothesis
    4. DAll of the above
  2. 2The ANOVA statistic is calculated by ____________
    1. ASubtracting the between groups variance from the within groups variance
    2. BAdding the between groups variance to the within groups variance
    3. CDividing the between groups variance by the within groups variance
    4. DMultiplying the between groups variance by the within groups variance
  3. 3You calculate an F ratio and get a value more than 1. How would you interpret this?
    1. AThere is more between groups variance than within groups variance
    2. BThere is the same amount of between groups variance as within groups variance
    3. CThere is less between groups variance than within groups variance
    4. DThere is no within groups variance
  4. 4You have calculated the SSbetween as 10 and the SStotal as 15, what would the SSwithin be?
    1. A5
    2. B0.67
    3. C-5
    4. D25
  5. 5Your study has four conditions with 20 participants in each condition. What would the df-within be?
    1. A79
    2. B76
    3. C77
    4. D80
  6. 6Which of the following is the correct way to calculate the MSbetween
    1. ASSbetween / df-between
    2. BSSbetween / SStotal
    3. CSSbetween * df-between
    4. DSSbetween * df-total
  7. 7A researcher wants to see if caffeine improves mathematics ability. She randomly assigned participants to three treatment groups: no caffeine (control), 40mg of coffee, and 80mg of coffee. After the treatment, all participants took a maths test. A one-way ANOVA was performed on the data.

    The output is shown below, but the F-value is missing. Using the other information in the table what should the F-value be?    Image for question 7
    1. A1.65
    2. B22.32
    3. C13.47
    4. D11.00
  8. 8What should the researcher conclude from the ANOVA results shown in question 7? Image for question 8
    1. AThere was a significant effect of treatment type on maths ability
    2. BThere was no significant effect of treatment type on maths ability
    3. CMaths ability was significantly worse with no caffeine
    4. DCaffeine significantly improves maths ability
  9. 9What does the eta squared tell us?
    1. AIf there is a significant difference between groups
    2. BHow much variance in the dependent variable can be accounted for by the independent variable
    3. CHow much variance in the independent variable can be accounted for by the dependent variable
    4. DIf homogeneity has been established
  10. 10If an author reports the results of an ANOVA as F (4, 65) = 9.56, p = 0.1, what is the between-groups degrees of freedom
    1. A65
    2. B9.56
    3. C4
    4. D5

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Description
Quiz on Research Methods IV - Week 2 Between Subjects ANOVA, created by Brage Haavik on 12/04/2019.
Language
English
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5.0 out of 5 · 9 ratings
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