A botanist is developing a strain of wheat plants that is expected to withstand

Question

A botanist is developing a strain of wheat plants that is expected to withstand high winds better than existing strains. She needs to estimate the true height of the plants when they are mature. She grows a crop of the new strain, randomly selects 100 mature plants, and measures their heights. Which confidence interval is most appropriate for this study?

A) , when is known is known

B) , when is unknown

C)The true mean of the differences, for paired data

D)The difference between two means, using independent samples

E) One proportion

F) Two proportion

Explanation / Answer

Here it is mentioned that botanist is developing a strain of wheat plants that is expected to withstand high winds better than existing strain. So it is clear that he needs to do comparison.

Further he grows new strains that means they are independent then existing.

So here he will need to find the difference between two means, using independent samples and hence anser is D.

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