On a standardized spatial skills task, data reveal that in the population, people have a mean of
Question:
On a standardized spatial skills task, data reveal that in the population, people have a mean of 15 correct solutions. A psychologist tests a sample of 7 people who have brain injuries in the right cerebral hemisphere and finds that they have a Sample Mean of 13.71 and a Sum of Squares of 73. Use the one sample t-test to determine whether righthemisphere damage results in significantly reduced performance on the spatial skills task.
1. Using symbols, state the null and alternative hypotheses.
2. Assuming α = .05, what critical value should be used to test the hypothesis that people with right hemisphere damage have reduced performance on the spatial skills task?
3. Calculate the one-sample t-statistic.
4. What decision should the researcher make about the null hypothesis?
5. What conclusion should the researcher reach about the effect of right hemisphere damage on spatial skills?
Statistics for Psychology
ISBN: 978-0205258154
6th edition
Authors: Arthur Aron, Elaine N. Aron, Elliot J. Coups