im not sure if that answer is right please help
Merle birch Map CAPO CENGAGE | MINDTAP Problem Set: Chapter 08 Introduction to Hypothesis Testing Back to Assignment Attempts: Average: 73 6. An example of a hypothesis test and the required assumptions A graduate student is performing a study on a new antipsychotic. The drug is supposed to reduce symptoms of psychosis, but the graduate student realizes that it may do nothing or even increase symptoms of psychosis, so he decides to formulate nondirectional hypotheses and conduct a two- tailed test. He knows that the avprage scare for all psychotic people is He -50, with a standard deviation of o – 7. If he designates the mean for the population of psychotic people who take the antipsychotic as Mantipsychotic, he can identify the null and alternative hypotheses as: Ho! Hun tipsychotice Hy: Huntipychotic * The sample of 110 psychotic people who tried out the new antipsychotic scored an average of 48.4. Since the graduate student knows the standard deviation of the scores on the psychotic symptoms inventory for the population of people who are psychotic, he intends to use a hypothesis test that uses the 2-score of the sample mean as the test statistic (also known as the z test). First, he wants to make sure all the required assumptions are satisfied. Which of the following conditions is not a required assumption for the z test? Each observation is Independent of every other observation. Members of the sample are selected randomly. The scores on the psychotic symptoms inventory follow a normal distribution or the sample size is large (at least 30). The mean of the scores on the psychotic symptoms inventory is the same for those who take the antipsychotic and those who don’t The standard deviation of the scores on the psychotic symptoms inventory is the same for those who take the antipsychotic and those who don’t. O O O .