The marketing firm in problem 1 has decided that age may also have an affect on
ID: 2932558 • Letter: T
Question
The marketing firm in problem 1 has decided that age may also have an affect on attention span. They decide to assign the children to groups of fifteen 9 to 10 year olds, fifteen 7 to 8 year olds, and fifteen 5 to 6 year olds. Within each group, the children are asked to watch one 60-second commercial for one of the three types of toys and their attention spans are measured in seconds.
a. Is this an experiment or an observational study?
b. If it is an experiment, is it randomized or block design?
c. If it is an experiment, identify the explanatory and response variables.
d. If this is an experiment, draw a diagram representing the levels and treatments.
Explanation / Answer
Answer:
The marketing firm in problem 1 has decided that age may also have an affect on attention span. They decide to assign the children to groups of fifteen 9 to 10 year olds, fifteen 7 to 8 year olds, and fifteen 5 to 6 year olds. Within each group, the children are asked to watch one 60-second commercial for one of the three types of toys and their attention spans are measured in seconds.
a. Is this an experiment or an observational study?
It is an experiment. (There is an intervention)
b. If it is an experiment, is it randomized or block design?
It is a block design, blocked on age group.
c. If it is an experiment, identify the explanatory and response variables.
explanatory variables: Age, type of toy
response variable: attention span ( in time)
d. If this is an experiment, draw a diagram representing the levels and treatments.
Toy
Type1
Type2
Type3
9-10 years
Age
7-8 years
5-6 years
Toy
Type1
Type2
Type3
9-10 years
Age
7-8 years
5-6 years
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.