A researcher is studying whether Lumostiy can improve memory performance. Subjec
ID: 3207134 • Letter: A
Question
A researcher is studying whether Lumostiy can improve memory performance. Subjects in the "training" condition play Lumostiy for 30 minutes each day for two weeks. Subjects in the control condition play an unrelated game for the same amount of time each day for two weeks. All participants then performed a memory task in which their long-term memory was tested. Identify the IV and the DV in this study. Write a directional research hypothesis the null hypothesis Create a decision table for this study. Mark Hit, False Alarm, Miss, and Correct Rejection in the table. Based on the data, the researcher rejected the null hypothesis, p = .03. if the test is conducted at alpha = .05 level, what is the research conclusion? What is the probability that the conclusion could be wrong? Which type of error would it be? The researcher rejected the null hypothesis. What is the probability of making a type 2 error?Explanation / Answer
a) IV , the independent variables would the 2 groups in this case : which are control groups and training groups
DV , the dependent variable is the value we are interested in , which is memory performane
The hypothesis formulation can be
H0 : There is no difference in the average memory performance of the 2 groups , control and training (part c of the question )
H1 : There is a significant improvement in the memory performace of the training group over the control group (part b of the question)
e) as a rule , we reject the null hypothesis if the calculated p value is less than the alpha value , which is 0.05 in this case. Hence as 0.03<0.05 we reject the null hypothesis and conclude that There is a significant improvement in the memory performace of the training group over the control group
The probability of making a type 1 error is also called alpha , which is 0.05 . This is a case of type 1 error , where we would reject the null hypothesis when we should not
Please note that we can answer only 4 parts of a question at a time , as per the answering guidelines
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