Manual Event (Session ID,DateTime,Event) = 6nalr8km7bj1t8hllilfiuq8rr 20210729100044 /courses-for-public/programme-evaluation-and-impact-assessment-3/presurvey/
Pre Survey
1
When determining the sample size, the researcher needs to consider which of the following?
- The desired power
- The expected effect size
- The acceptable level of significance
A
Only i
B
Only ii
C
ii and iii
D
i, ii and iii
2
Which of the following statements about power is correct?
A
Power is commonly denoted as β, which refers to a type II error (i.e. acceptance of a false null hypothesis)
B
Power is commonly denoted as 1 – β, in which β refers to a type I error (i.e. acceptance of a false null hypothesis)
C
Power refers to the probability that a statistical test will reject the null hypothesis when the null hypothesis is false.
D
Power refers to the probability that a statistical test will accept the null hypothesis when the null hypothesis is false.
3
Effect size is
- A qualitative measure of the magnitude of the difference between groups.
- A quantitative measure of the magnitude of the difference between groups.
- Particularly valuable for quantifying the effectiveness of a particular intervention.
A
Only i
B
Only ii
C
Only ii and iii
D
i, ii and iii
4
Which of the following is/are used as an index of effect size?
- Pearson’s correlation (r)
- Cohen’s d
- Eta-squared (η2)
A
Only i
B
Only ii
C
Only ii and iii
D
i, ii and iii
5
Which of the following statements about sample size is correct?
A
The smaller the sample size, the larger the variance of the sampling distribution of the mean.
B
The larger the sample size, the larger the variance of the sampling distribution of the mean.
C
The smaller the sample size, the smaller the variance of the sampling distribution of the mean.
D
The larger the sample size, the smaller the variance of the sampling distribution of the mean.
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