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Manual Event (Session ID,DateTime,Event) = j63i08ff2toaoc91j50h6ha93v 20210802115109 /web-based-audio-visual-learning-materials/programme-evaluation-and-impact-assessment-4/presurvey/

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1

Which of the following is/are required for calculating sample size?

  1. A desired power
  2. A desired level of significance (i.e. alpha)
  3. A clinical meaningful difference
A
Only i
B
Only ii
C
Only ii and iii
D
i, ii and iii
2

Which of the following statements about 95% confidence is correct?

A
95% confidence means that you are 95% confident that your result is positive.
B
95% confidence means that you are 95% confident that your result is negative.
C
95% confidence means that you are 95% confident that there is a signal of an effect.
D
95% confidence means that you are 95% confident that there is no signal of an effect.
3

Which of the following statements is correct?

A
There are two techniques for calculating sample size: making reference to previous studies and guessing.
B
There are two techniques for calculating sample size: making reference to previous studies and testing hypotheses.
C
There are two techniques for calculating sample size: estimating and testing hypotheses.
D
There are two techniques for calculating sample size: making reference to previous studies and estimating.
4

Which of the following statements is correct?

A
Calculating the sample size for single-group studies is based on the confidence interval, which is the precision required for estimating ratios, differences and ranges.
B
Calculating the sample size for two -group studies is based on the confidence interval, which is the precision required for estimating significance, proportions and means.
C
Calculating the sample size for two -group studies is based on the confidence interval, which is the precision required for estimating ratios, significance and ranges.
D
Calculating the sample size for single-group studies is based on the confidence interval, which is the precision required for estimating rates, proportions and means.
5

Which of the following information is required for calculating the sample size for comparative studies?

  1. The desired confidence interval
  2. The desired power
  3. The ratio of the sample size of Group 2 to Group 1
  4. The means or mean difference of the two groups
  5. The standard deviation or variance of the two groups
A
Only i
B
Only ii
C
Only ii and iii
D
All of the listed information is required.
Please answer all the questions above to proceed