Scores on the Wechsler Adult Intelligence Scale- ThirdEdition (WAIS-III) are nationally standardized to be normallydistributed with a mean of 100 and standard deviation of 15. Apsychologist has a dataset containing the WAIS-III scores from arandom sample of 50 adults who are members of a specificorganization. They want to know if there is evidence that the meanWAIS-III score in the population of all members of thisorganization is greater than the known national mean of 100. In thesample of 50 adults, the observed sample mean was 105. When doingany hand calculations, show all work.
1) Our comparison distribution will be adistribution of sample means. What are the shape, mean, andstandard deviation (i.e., standard error) of that distribution ofsample means?
