6 a psychologist is interested in knowing whether

_____________________________
6-A psychologist is interested in knowing whether adults who were bullied as children differ from
the general population in terms of their empathy for others. On a questionnaire designed to
measure empathy, the mean score for the general population is 51.46. Random sampling of 67
scores obtained from individuals who were bullied yielded a mean of 32.05 and a standard
deviation of 12.2. (Use these numbers only for this question!)
What is the z-value or t-value you obtained (your test statistic)?
7-A psychologist is interested in knowing whether adults who were bullied as children differ from
the general population in terms of their empathy for others. On a questionnaire designed to
measure empathy, the mean score for the general population is 30.6. Random sampling of 25
scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard
deviation of 6.6.
Test at the .05 level of significance.
The value of your calculated (obtained) test statistic is 6.74. What is your decision?
8-A psychologist is interested in knowing whether adults who were bullied as children differ from
the general population in terms of their empathy for others. On a questionnaire designed to
measure empathy, the mean score for the general population is 30.6. Random sampling of 25

scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard
deviation of 6.6.
Test at the .05 level of significance.
The best conclusion for this example (based on your answer to Q8) would be
9-A psychologist is interested in knowing whether adults who were bullied as children differ from
the general population in terms of their empathy for others. On a questionnaire designed to
measure empathy, the mean score for the general population is 30.6. Random sampling of 25
scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard
deviation of 6.6.
Test at the .05 level of significance.
Based on your evaluation of the null in Q8 and your conclusion is Q9, as a researcher you
would be more concerned with a
A-Type I statistical error
10-A psychologist is interested in knowing whether adults who were bullied as children differ
from the general population in terms of their empathy for others. On a questionnaire designed to
measure empathy, the mean score for the general population is 74.27. Random sampling of 76
scores obtained from individuals who were bullied yielded a mean of 71.9 and a standard