A therapist interested in helping individuals with Ophidiophobia (fear of snakes

Question

A therapist interested in helping individuals with Ophidiophobia (fear of snakes). In order to do this, the therapist is going to slowly desensitize the patients to snakes. He needs to find a starting point so he presented a sample of 4 ophidiophobics with snake related stimuli and measured their physiologic response in response to each stimuli (l(not at all afraid) - 20 (extremely afraid)). The data is presented in the table below: Using an a = .01, conduct the appropriate hypothesis test to find if significant differences exist between snake-related stimuli and their effect on physiological response. Show all 4 hypothesis testing steps, and show an ANOVA summary table. Conduct a Tukey's HSD test. Write a passage summarizing the results in APA format.

Explanation / Answer

Sol)

Hypothesis 1

Ho: All the four Treatment means are equal

H1: All the four treatments are not equal

Hypothesis 2:

H0: All the blocks means are equal

H1: All the blocks means are not equal

Level of significance:1%

Test statistic:

Conclusion:

For treatments: F cal =3.93

and P value=0.07 > 0.01, we accept Ho. Hence all the treatment means are equal

For blocks: F cal=21.8

and P value=0.0017<0.01 we reject the Ho.

Hence all the block means are not equal

Anova: Two-Factor Without Replication SUMMARY Count Sum Average Variance 1 3 33 11 13 2 3 21 7 25 3 3 18 6 12 4 3 27 9 43 picture 4 16 4 4.666667 plastic 4 31 7.75 10.91667 rubber 4 52 13 6.666667 ANOVA Source of Variation SS df MS F P-value F crit Rows 44.25 3 14.75 3.933333 0.072353 4.757063 Columns 163.5 2 81.75 21.8 0.00177 5.143253 Error 22.5 6 3.75 Total 230.25 11

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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