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Iowa corn typically yields 160 bushels per acre. A new experimental variety, grown on 36 1-acre test plots, yielded 163.5 bushels on average, with a...

Iowa corn typically yields 160 bushels per acre. A new experimental variety, grown on 36 1-acre test plots, yielded 163.5 bushels on average, with a standard deviation of 13.5 bushels. At a 5% significance level, can we conclude that the new variety has a higher yield?
Question 11 options:

No, it clearly has the same yield.

Yes, it clearly has a higher yield.

We can clain it has a higher yield, but only at the 1% significance level.

Although it may have a higher yield, we really can't claim it does.

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