On a standardized spatial skills task, normative data reveal that people typically get μ = 15 correct solutions. A psychologist test n = 7 individuals who have brain injuries in the right cerebral hemisphere. The number of correct solutions for these individuals yielded a sample mean of 11 correct solutions and a sample standard deviation of 2.5. Determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha = .05 and a one-tailed distribution. The data are as follows: Identify the independent and dependent variables. In a sentence, state the null hypothesis being tested. Using symbols, state the null and alternative hypotheses.
On a standardized spatial skills task, normative data reveal that people typically get μ = 15 correct solutions. A psychologist test n = 7 individuals who have brain injuries in the right cerebral hemisphere. The number of correct solutions for these individuals yielded a sample mean of 11 correct solutions and a sample standard deviation of 2.5. Determine whether or not right-hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha = .05 and a one-tailed distribution. The data are as follows:
- Identify the independent and dependent variables.
- In a sentence, state the null hypothesis being tested.
- Using symbols, state the null and alternative hypotheses.
- Determine the critical region using a one-tailed test with alpha = .05.
- Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values).
- State your conclusions in terms of H0 (Should you reject the H0 or fail to reject/accept the H0).
- Based on your analysis, is there a relationship between the drug and attention span?
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The provided information is:
Sample size
Sample mean
Sample standard deviation (s)=2.5
Hypothesized mean
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