Question

a health psychologist tests a new intervention to determine if it can change healthy behaviors among siblings to conduct the this test issuing 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 sibling during a 5 minute observation were then recorded

th psychologist tests a new intervention to determine if it can change healthy behaviors among siblings. To conduct the this test using a m and the other sibling is given a control task without the intervention. The number of healthy behaviors observed in t ere then recorded. (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 y 1.86 State the decision to retain or reject the null hypothesis. Retain the null hypothesis. O Reject the null hypothesis (b) Compute effect size using eta-squared. (Round your answer to two decimal places.) 107 Type here to search

Answer 1

Paired T-Test and CI: Yes, No

Paired T for Yes - No

N Mean StDev SE Mean
Yes 6 6.167 1.169 0.477
No 6 5.333 0.516 0.211
Difference 6 0.833 1.602 0.654

95% CI for mean difference: (-0.848, 2.515)
T-Test of mean difference = 0 (vs not = 0): T-Value = 1.27 P-Value = 0.259

(a) 1.27

Since p-value=0.259>0.05

So retain the null hypothesis.

(b)

$\eta^2=\frac{\bar{d}}{s_d}=0.833/1.602=0.52$