19.

Developmental Psychology (March 2003) published a study on teacher perceptions of the behavior of elementary school children. Teachers related the aggressive behavior of a sample of 11,160 New York City public school children by responding to the statement \"This child threatens or bullies others in order to get his/her own way.\" Responses were measured on a scale ranging from 1 (never) to 5 (always). Summary statistics for the sample of n = 11,160 children were reported as :E' = 2.15 and s : 1.05. Assume that the responses of all New York City public school children follow a normal distribution with mean [1. Suppose you want to test H0 : p. = 3 vs Ha : a 79 3. Find the observed value of the test statistic given the sample.