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Mathematics, 25.02.2020 05:25 kfloyd6046
Rothamsted Experimental Station (England) has studied wheat production since 1852. Each year many small plots of equal size but different soil/fertilizer conditions are planted with wheat. At the end of the growing season, the yield (in pounds) of the wheat on the plot is measured.
(a) Suppose for a random sample of years, one plot gave the following annual wheat production (in pounds):
4.46, 4.21, 4.40, 4.81, 2.81, 2.90, 4.93, 3.54, 4.16, 4.48, 3.26, 4.74, 4.97, 4.02, 4.91, 2.59
For this plot, the sample variance is ___.
(b) Another random sample of years for a second plot gave the following annual wheat production (in pounds):
3.89, 3.81, 3.95, 4.07, 4.01, 3.73, 4.02, 3.78, 3.72, 3.96, 3.62, 3.76, 4.02, 3.73, 3.94, 4.03
For this plot, the sample variance is ___.
(c) Test the claim using that the population variance of annual wheat production for the first plot is larger than that for the second plot.
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