Question

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 .

Answer 1

I test Assumptions. D. Dataset should be continuous 2. X; NNCM, out) ly large sample theory We take normal approximation, randomly 3. members of the samples are selected. 4 The population 3.D is known. Each individuals are independent we know when population mean is given, then brom it about the average of all chooacteristig in the dataset for the standard deviation we mean the same. But if we cissiby the dataset like please psychotic and atipsychotic, obviously standard deviation will be dibberent ber each characteristic, However it's not the assumption ob Z- testo

I think you got your explanation and you correct.