What proportion of the standardized scores of a sample lies ...

[Metfan725]

What proportion of the standardized scores of a sample lies between the Z-scores of 1.96 and +1.96?
 
  a. 34.0
  b. 47.7
  c. 68.3
  d. 95.5

Question 2

Serendipitous findings are best dealt with in which of the following ways?
 
  a. Included in the final written report
  b. Incorporated into the ongoing study
  c. Ignored because they are suspect findings
  d. Interchanged with the dependent variable

[shaikhs]

Answer to Question 1

ANS: D
Z-scores are a common standardized score used to express deviations from the mean in terms of standard deviation units. Figure 12-1 demonstrates that standardized scores lying between the Z-score of 1.96 and +1.96 are distributed over 95.5 of the normal curve.
34.0 of cases will be 1 score above or below the mean.
Approximately 47.7 of cases will be 1.96 above OR below the mean.
68.3 of cases will lie between the Z-scores of 1.0 and +1.0.

Answer to Question 2

ANS: A
Serendipitous findings are useful findings accidentally discovered during data analysis. They can lead to new areas of research that generate new knowledge.
Although serendipitous findings should be included in a report of the study, they should not be incorporated in the same way as the findings that resulted from the original study plan.
Serendipitous findings should be treated with caution because they have not been fully explored, but they should not be ignored.
Chance findings, although possibly important, cannot be interchanged with the variables that the study set out to explore.