Chapter 1 1 HW#2 A research study by Guéguen and Jacob (2012) showed that waitre

Question

Chapter 1 1 HW#2 A research study by Guéguen and Jacob (2012) showed that waitresses received significantly larger tips when they were wearing red T-shirts compared to other colors. The actual study used a repeated-measures design in which waitresses in five different restaurants wore the same T-shirt in six different colors (red, blue, green, yellow, black, and white) on different days during a six-week period. Each waitress recorded the average tip received while wearing red and the average while wearing another color and computed the difference between the two scores. A similar study also found that tips were higher when waitresses wore red, with a mean difference of Mo 32 cents for each $10 of restaurant bill for a sample of n 11 waitresses. If the difference scores had s2 539, are the data sufficient to decide that tips are significantly higher when waitresses wear red? Use a one-tailed test with a.01. t Distribution Degrees of Freedom-21 5000 5000 4.03.0 2.01.0 0.0 0.000 1.0 2.0 3.0 4.0 AUK The estimated standard error is and t(10) With a critical boundary of Ho. A red T-shirt tips significantly.

Explanation / Answer

Ans:

n=11

df=11-1=10

standard error=sqrt(539/11)=7

Test statistic:

t(10)=(32-0)/7

t(10)=4.571

critical t value=2.764

Reject Ho,if t>2.764

As,t=4.571>2.764,we reject the null hypothesis.

There is sufficient evidence to conclude that tips are significantly higher when waitresses wear red.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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