Answer the following question

SP A group of 78 third-grade students in a Midwestern elementary school took a "self-concept" test that measured how they felt about themselves. Higher scores indicate more positive self-concepts. A histogram and some summary statistics for these students' self-concept scores are given below Account 15 Dashboard 10 Courses Frequency Calendar 25 30 35 40 50 55 60 65 70 75 80 85 Sef-concept Inbox Descriptive Statistics: SelfConc SF Learning Variable N Mean StDev Minimum Q1 Median Q3 Maximum Commons SelfConc 78 56.85 12.35 20.00 50.00 59.00 65.00 84.00 ? Help (a) One student in the group had a self-concept score of 62. Calculate and interpret this student's z-score. (b) Interpret the standard deviation. (c) What percentage of the third graders scored less than 30 on the self-concept test? (d) Determine if 84 is an outlier. Edit Insert Format Tools Table 12pt Paragraph B K