To delerine whether a new lype of matress will cul dow on e number of bed sores,

Question

To delerine whether a new lype of matress will cul dow on e number of bed sores, a nursing home randomly assigns 10 bed tidkien patients lo the new matress and 10 bed ridden palienls lo the old malress. Aler 10 weeks ey exame the 20 palients to determine it they have any new bed sores and compare the resi lts tor the two grous his is an example ot a A. O B. ° C. O D. randomized block experiment. completely randomized experiment. non-of the other answers are true. a tuo tactor experiment The factorís) for this study isare A, new trialress/ old matress O B. patents ° C. number ot bed sores D. type ot matress

Explanation / Answer

Answer to the question is as follows:

Lets check the definition of randomized block experiment:

With a randomized block design, the experimenter divides subjects into subgroups called blocks, such that the variability within blocks is less than the variability between blocks. Then, subjects within each block are randomly assigned to treatment conditions.

So this is a case of randomized block experiment, the blocks being the 2 groups of bed ridden patiets divided to make gorups for new and old mattresses

The factors under study is the treatments the 2 groups receive, which is essentially the type of matress

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