Q) The Chapin Social Insight test evaluates how accurately a subject appraises other people. In the reference population used to develop the test, scores are approximately normally distributed with mean 25 and standard deviation 5.

a (a) Calculate the proportion of the population that has scored below 17 on this test.

b The administer of Chapin test wants to recruit those who score in the top 10% for evaluation purposes. Approximately, what is the minimum score needed to be considered?