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A teacher is interested in knowing whether adults who were bullied as kids 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. What would the most appropriate null hypothesis would be which one??
1 there is a statically difference in the amt. of empathy expressed when comparing individuals who were bullied to the general population.
2 there is no statically difference in the amount of empathy expressed when comparing individuals who were bullied to the general population.
3 being bullied does significantly increase when compared to the population of individuals in the general population who have not been bullied.
4 being bullied does not significantly increase empathy when compared to the population of individuals in the general population who have not been bullied.
In an exam, the mean score is 70 and the variance is 16. What is the probability that a student's score will lie within the "54 to 86" range?
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