Question

ch 9 a researcher studying the effect of price cuts on consumers’ expectations makes up two different histories of the store price of a hypothetical brand of laundry detergent for the past year. eight students in a class view one or the other price history on a computer. some students see a steady price, whereas others see regular sales that temporarily cut the price. students are asked the price they would expect to pay.

the experimental units are

○ all business students at the college.

○ the business students who were in the fluctuating price group.

● the eight business students who participated.

○ the price they would expect to pay.

question 20
1 pts
ch 9 researchers believed that floral scent can sometimes improve a person’s learning ability. they set up an experiment in which each of 22 subjects completed sets of mazes. each subject wore a floral-scented mask and an unscented mask in random order. the researchers measured the time to complete the sets of mazes.

what is the response variable?

● presence or absence of floral scent

○ the time to complete the sets of maze

○ the amount of scent

○ whether the subject was able to complete the mazes quicker while wearing the floral-scented mask

Explanation:

First Question (Experimental Units)

Experimental units are the entities on which the experiment is performed. Here, the experiment is done on eight students who participated (they view price histories and give expected prices). "All business students" is too broad, "fluctuating price group" is a subgroup, and "expected price" is a variable, not units.

A response variable is what's measured in an experiment. The experiment measures time to complete mazes (to see effect of scent on learning/performance). "Presence/absence of scent" is explanatory, "amount of scent" isn't measured, and the last option is a comparison, not the measured variable.

Answer:

the eight business students who participated.

Second Question (Response Variable)