Question

A psychologist is interested in identifying the reaction of human behaviour under a stressful circumstance (fight or flight behaviour). It is known that, when using a particular method for measurement, the accuracy ratings of people in the general population (those The South African College of Applied Psychology Statistics for the Social Sciences A Assessment 2 4 that stay calm) are normally distributed with an average or mean of 60 and a variance of 44. In this study, psychologists aim to test 40 people who are prone to fight (military). The mean accuracy of these individuals were 62. Using α= 0.05 for a one tailed Z-test, what should the psychologist conclude for the sample?

Answer 1