A Clinical Neuropsychologist Develops a New Treatment for Recovery from Head

question 84

Multiple Choice

A clinical neuropsychologist develops a new treatment for recovery from head trauma and administers it to one half (randomly selected) of a sample of 50 people.He measures the level of cognitive functioning one month after the trauma and analyses the data in SPSS.The output of a between-participant t-test is shown below: Which of the following statements is true?

• A)There are good grounds to suspect that the variances are unequal.
• B)We should reject the results of this test due to the unequal variances.
• C)Both (a)and (b).
• D)It is not surprising that the cognitive functioning is variable following head trauma so we should pay no attention to unequal variances, especially as the t-test is robust to violation of assumptions.
• E)All of the above.

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Definitions:

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