Which of the following best describes a randomized experiment? a) testing strength using random groups chosen from all people b) testing strength using a random group of men c) testing strength using a random group of teenagers d) testing strength using random groups chosen for sex, age, height, and weight

im on odessey and i put D because the definition is ''definition

Answer with explanation:

In Randomized Experiment, we form groups on the basis of the condition prescribed.And,then treatment or experiment is done. Suppose,a researcher is trying to find the effect of manure made by farmer on fifty kind of plants .He Made 10 blocks of plants , each being 5 in number,and arranged them ,in the order of effect of fertilizer.

In Randomized experiment ,in which different kind of treatment is done on the objects, to find out the responses which may be different. But in an observational study,we do not change the conditions, suppose we are trying to find the value of acceleration due to gravity on the surface of earth at ten different places , on the earth,but in randomized experiment, we are trying to figure out the value of g, but different condition are applied to check whether there is any difference.

→In option D, Four blocks or Random groups are formed ,on the basis of  ,Sex, Age, Height, and Weight,and then treatment or experiment is done:

Option D:→Testing strength using random groups chosen for sex, age, height, and weight, is a Randomized Experiment.

1. 34

2. 268

3. x=14.4

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11