Thirty (n=30) hypertensive individuals (Systolic Blood Pressure SBP 160 mm hg) w

Question

Thirty (n=30) hypertensive individuals (Systolic Blood Pressure SBP 160 mm hg) were randomly assigned to one of three hypertensive medications (Drugs X, Y, or Z), either alone or combined with biofeedback (Yes/No). Drug and biofeedback are between-subjects factors. Resting SBP for each subject taken one month after the assigned drug/biofeedback combination are presented in the gray shaded cells in the table below.

Part A)     What is the appropriate statistical procedure to test H0: XBiofeedback= XNo Biofedback; H0: XDrug X= XDrug Y=X Drug Z; and H0: XBF-X= XBF-Y= XBF-Z= XNo BF-X= XNo BF-Y= XNo BF-Z?

            a.         dependent t-test

            b.         independent t-test

            c.         oneway ANOVA

            d.         repeated measures ANOVA

            e.         factorial ANOVA

Part B)      What it the critical statistical value to test H0: XBiofeedback= XNo Biofedback at =0.05?

            a.         1.717

            b.         1.796

            c.         2.064

            d.         4.26

            e.         7.82

Part C) What it the critical statistical value to test H0: XDrug X= XDrug Y=X Drug Z; and H0: XBF-X= XBF-Y= XBF-Z= XNo BF-X= XNo BF-Y= XNo BF-Z at =0.05?

            a.         1.796

            b.         2.56

            c.         3.40

            d.         5.61

Part D) Select the correct statement below.

            a.         There are significant biofeedback and drug main effects and a significant biofeedback x

                        drug interaction effect.

            b.         All three drug means are significantly different from each other.

            c.         Subjects not receiving biofeedback had lower SBP than those receiving biofeedback

                        regardless of drug assignment.

            d.         a, b, and c are incorrect.

            e.         Regardless of biofeedback, subjects receiving Drug X has a lower SBP than subjects

                        receiving Drugs Y and Z.

Marginal Biofeedback Level Means Biofeedback Yes 170 186 180 175 194 187 165 201 199 180 215 170 204 160 219 170 203 188 EX Yes Meana 187 X Cell Means Ls Cell SD T-9 13.9 13.8 Ls Yes SD 18.0 202 No 173 189 194 194 2228 197 217 190 190 206 206 176 199 224 I X Cell eans 186 201 210 XNo Mean. 199 Cell SD 10.8 10.9 15.8 S No SD 15.6 193 Marginal Drug Level X Mean 178 202 1909 X Total Mean Means 12.3 11.8 18.2 sx Total SD 17.6 Source 1 1080 Biofeedback 3420 Drug Biofeedback Drug 780 2 244 3738 Error 229 9018 Total Pairwise Comparison Calculated q Biofeedback Main Erect Yes vs No NA 187 199 NA Drug Main Effect X vs. Y 178 202 6.08 X vs. 2 178 199 Critical q 3.53 5.32 Y vs.Z 202 199 0.76

Explanation / Answer

1)

Answer: D

That is, repeated measures ANOVA.

Since there exist an interaction and it has rows and blocks.

2)

Answer: D

That is, 4.26

Since the critical value of F for 5% level of significance and (1, 24) degree of freedom is 4.26

3)

Answer: B

That is, 2.56

4)

Answer: B

That is, all three drug means are significantly different from each other.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.