Question

(ANSWER THE NEXT Q´S AFTER READING THIS STUDY) High-risk children who consumed peanut products from infancy until they were 5 years old were significantly less likely to develop a peanut allergy than those who avoided peanuts, according to the LEAP randomized trial. The 640 infants in the trial were aged 4 to 11 months at enrollment, and all had severe eczema, egg allergy, or both. Participants in each cohort were randomly assigned to consume a peanut protein containing bar or to avoid peanuts. Among the 530 infants in (one) cohort, the prevalence of peanut allergy at 60 months was 13.7% in the avoidance group and 1.9% in the consumption group. The absolute difference in risk of 11.8% represents an 86.1% relative reduction in the prevalence of peanut allergy.

#1 What is the treatment variable in this study

A) having severe eczema and/or egg allergies or not

B) having allergies to peanuts or not

C) consuming peanut protein bar or avoiding peanuts

#2 What is the response variable in the study?

A) having severe eczema and/or egg allergies or not

B) having allergies to peanuts or not

C) consuming peanut protein bar or avoiding peanuts

#3 What would be the null hypothesis for this study?

A) Ho: pi = 0

B) Ho: pi1 - pi2 = 0

C) Ho: mu = 0

D) Ho: mu1 - mu2 = 0

Answer 1

(1)

Question: What is the treatment variable in this study

Correct option:

consuming peanut protein bar or avoiding peanuts

Explanation:
Treatment Variable is the one the researcher manipulates in order to study itseffect on the response variable. Here consuming peanut protein bar or avoiding peanuts is manupulated by the researcher.

(2)

Question: What is the response variable in the study?

Correct option:

having allergies to peanuts or not

Explanation:

Response Variable is the variable of interest to the researcher. Here having allergies to peanuts or not is the objective of the study by the resarcher.

(3)

Correct option:

(B) Ho: pi1 - pi2 = 0

Explanation:

Here the research question is: To study whether high-risk children who consumed peanut products from infancy until they were 5 years old were significantly less likely to develop a peanut allergy than those who avoided peanuts.