A health psychologist tests a new intervention to determine if
it can change healthy behaviors among siblings. To conduct the this
test using a matched-pairs design, the researcher gives one sibling
an intervention, and the other sibling is given a control task
without the intervention. The number of healthy behaviors observed
in the siblings during a 5-minute observation were then
recorded.
Intervention
Yes No
6 4
3 5
6 4
5 5
6 4
5 4
(a) Test whether or not the number of healthy behaviors differ
at a 0.05 level of significance. State the value of the test
statistic. (Round your answer to three decimal places.). . (b)
Compute effect size using eta-squared. (Round your answer to two
decimal places.)