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Chapter 4: Q. 87 (page 268)

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

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

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

2?

a. Yes, because 140bushels per acre is greater than 110bushels 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鈥檛 double-blind.

Short Answer

Expert verified

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

variety. Option c is correct option

Step by step solution

01

Given Information

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

02

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 2lowered 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.

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