Alocal university produced a study in which it chose 1000 students to participate. the study asked each student to write down the number of hours spent studying in a one week period. which element of experiment design is known to be a part of this study?

The correct answer is REPLICATION

Step-by-step explanation:

Replication is important for the support of the study. It is when a procedure repeats using the same methods, different subjects and experiments. It also involves the application of the theory of the study in new situations in order to generalize it. Replication assurances the validation and reliable of the results, generalize them

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.