Which are paired designs and which are two independent randomsample designs? For each #, it's one or the other...
#1 (a) Study of shopping at Wal-Mart. Study is on whether morego in non-grocery door than the grocery door? Study is done bycounting the number of people entering each door from 7-9pm everyMonday for 2 months.
(b) Study of shopping at Wal-Mart, but to collect data thenumber of people entering each door from 7-9pm on non-grocery andgrocery at random and NOT collect both each time together. Forexample, do a non-grocery count this Monday from 7-9pm, thennon-grocery again Tuesday from 7-9pm, and then grocery on Wednesdayfrom 7-9pm, etc.
#2 (a) Study is on the effect of magnetic fields on healingtimes. To collect data you take 100 random individuals prick asingle finger on each. Half of them you use magnetic field on andthe others you don't. You record healing time.
(b) Study is on the effect of magnetic fields on healing times.On each of the 100 participants you prick one finger on each hand.Apply magnetic field to one finger and nothing to the other. Youmeasure healing times for fingers.
#3 (a) Taste testing is done in which each participant triescoke and pepsi both and rates them both. (b) Taste testing is donein which each person just tastes one and rates it and some otherrandom person tastes the other and rates it.
#4 (a) Study of whether more movies are rented at Redbox onFriday or Saturday nights. Record rental numbers every week for 6months on each Friday and the Saturday right after it.
(b) Study of whether more movies are rented at Redbox on Fridayor Saturday. To get the data you randomly pick 24 Friday’s and thenrandomly pick 24 Saturday’s and record rentals on each. Note, it isNOT necessary for them to one right after the other.
#5 (a) Randomly pick 50 items that have been produced and usemethod one on it, then randomly pick another 50 and use method twoon it.
(b) Match two items up because they came off production linetogether. Apply method one to one of them and method two to theother.
