Antisocial personality disorder (ASPD) is characterized by deceitfulness, reckle

Question

Antisocial personality disorder (ASPD) is characterized by deceitfulness, reckless disregard for the well-being of others, a diminished capacity for remorse, superficial charm, thrill seeking, and poor behavioral control. ASPD is not normally diagnosed in children or adolescents, but antisocial tendencies can sometimes be recognized in childhood or early adolescence. James Blair and his colleagues have studied the ability of children with antisocial tendencies to recognize facial expressions that depict sadness, happiness, anger, disgust, fear, and surprise. They have found that children with antisocial tendencies have selective impairments, with significantly more difficulty recognizing fearful and sad expressions. Suppose you have a sample of 40 children with antisocial tendencies and you are particularly interested in the emotion of disgust. You find that while the average 12-year-old has a score of 11.80 on the emotion recognition scale, your sample of 12-year-old children with antisocial tendencies has an average score of 12.55 with a standard deviation of 3.28. A higher score represents that it took a higher degree of emotional expression for the child to correctly identify the emotion of disgust, indicating greater difficulty recognizing the emotion. Assume that scores on the emotion recognition scale are normally distributed. You want to test whether your sample of children with antisocial tendencies has more difficulty recognizing the emotion disgust than the general population of 12-year-olds. The directional alternative hypothesis is: The children with antisocial tendencies recognize disgust with the same accuracy as the general population. Therefore, the sample with X_obt = 12.55 is a random sample from a population where mu = 11.80 (H_1: mu_antisocial = 11.80). The children with antisocial tendencies have more difficulty recognizing disgust than the general population. Therefore, the sample with X_obt = 12.55 is a random sample from a population where mu > 11.80 (H_1: mu_antisocial > 11.80). The children with antisocial tendencies recognize disgust differently than the general population. Therefore, the sample with X_obt = 12.55 is a random sample from a population where mu notequalto 11.80 (H_1: middotmu_antisocial notequalto 11.80). The children with antisocial tendencies have less difficulty recognizing disgust than the general population. Therefore, the sample with X_obt = 12.55 is a random sample from a population where mu

Explanation / Answer

the direction alternative: 2nd option is correct >11.80

null hypothesis: first option is correct

evaluate the hypothesis using a t test statistic.

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