Question

ch 9 in order to investigate treatments for morbid obesity, obese subjects satisfying fairly strict requirements were randomly assigned to one of three groups: (1) gastric bypass surgery, (2) participation in a diet and exercise program, or (3) both gastric bypass surgery and participation in the diet and exercise program. researchers carefully observed the amount of weight lost five years after the study began. the response variable is

the amount of weight lost five years after the study began.

the kind of program to which a subject was assigned.

gastric bypass surgery.

random assignment.

question 13
1 pts
a fashion store is interested in attracting new customers using different marketing strategies. they prepare ads for dresses announcing four different levels of discounts: 10%, 20%, 30%, or 40%. they prepare two sets of ads: one in black and white, the other in color. one hundred females are asked to rate the attractiveness of the sale on a scale of 1 to 10. the response variable is/are

the marketing strategies.

the different levels of discounts.

the attractiveness of the sale.

the two sets of ads.

Explanation:

First Question (Obesity Study)

In an experiment, the response variable is what is being measured or observed. Here, the study investigates weight - loss treatments, and the amount of weight lost five years later is what's observed. The kind of program is the explanatory variable (treatment), gastric bypass surgery is part of a treatment, and random assignment is the method of group allocation, not the response.

In this marketing experiment, the response variable is what is being measured. The store is interested in the attractiveness of the sale (rated by females), while marketing strategies, discount levels, and ad sets are explanatory variables (factors being manipulated) to see their effect on the attractiveness rating.

Answer:

the amount of weight lost five years after the study began.

Question 13 (Fashion Store)