Question

Corn variety $1$yielded $140$bushels per acre last year at a research farm. This year, corn

variety $2$, planted in the same location, yielded only $110$bushels per acre. Based on these

results, is it reasonable to conclude that corn variety $1$is more productive than corn variety

$2$?

a. Yes, because $140$bushels per acre is greater than $110$bushels per acre.

b. Yes, because the study was done at a research farm.

c. No, because there may be other differences between the two years besides the corn

variety.

d. No, because there was no use of a placebo in the experiment.

e. No, because the experiment wasn’t double-blind.

Short answer

No, because there may be other differences between the two years besides the corn

variety. Option c is correct option

Step-by-step solution

Given Information

We are given that corn variety $1$yields $140$bushels per acre last year. In present year variety $2$yields $110$bushels per acre. We need to find correct option from given options.

Explanation

Experimenters do not control the natural variables such as humidity, fertility of soil, amount of rain etc.

So we don't know whether productivity of variety $2$lowered due to corn variety or other variables. So option c is correct that states that No, because there may be other differences between the two years besides the corn variety.