Question

(1 point) a market research company wishes to find out whether college of idaho students prefer brand a or brand b of instant coffee. a random sample of students is selected, and each one is asked to try brand a first and then brand b (or vice versa, with the order determined at random). they then indicate which brand they prefer. (a) the response variable here is a. whether brand a or brand b is tried first. b. which brand they prefer. c. the identity of the student. d. none of the above. (b) this is an example of a. a matched - pairs experiment b. block design. c. stratified sampling design. d. an observational study, not an experiment. note: you can earn partial credit on this problem. you have attempted this problem 0 times. you have 5 attempts left before new version will be requested. you have 3 attempts remaining.

Explanation:

Part (a)

A response variable is the outcome being measured or observed. Here, the market research company wants to know which brand (A or B) the students prefer. Option A is the explanatory variable (the order of trying brands), Option C is not the variable of interest, and Option B is the response variable as it's what's being measured (preference between the two brands).

A matched - pairs experiment involves comparing two treatments (here, brand A and brand B) on the same group of subjects (students), with each subject getting both treatments (tried both brands, order randomized). A block design groups subjects into blocks, stratified sampling is for sampling from sub - groups, and this is an experiment (not observational) as treatments are applied (students are asked to try the brands). So it's a matched - pairs experiment.

Answer:

B. which brand they prefer.

Part (b)