QUESTION 15 5 points Save Answer Your friend's small coffee business in Uganda is trying to decide what farming strategy will yield the greatest number of coffee beans at the highest quality. His agriculture team runs an experiment to see what kind of strategy works best for his coffee farmers. Among his farmers, he randomly assigns the standard strategy, crop rotation, to 25 farmers and an alternative strategy of poly cropping to the other 25 farmers, During the time of the experiment, the weather is normal and expected for the season without any out of the ordinary weather events. 13 farmers that used poly cropping see improvement in their numbers and quality over the course of the harvest season and 7 farmers from the crop rotation group see improvement. All other farmers in both groups neither see improvement nor worsening; their yield stays the same. a) Identify experimental and control groups and Identify the variable of interest. b) Has he done anything to control for other variables? c) Calculate the two percentages and 'd' For full credit, show your work, Are the results statistically significant? Table below. d) What can he do to find out if poly cropping was the cause of improvement? e) Your friend suggests trying this experiment with the same farmers in a more western region of the country. If this region is slightly dryer and cooler than the east, should these results about the farming strategies bear on the prior findings? Table 11-1 Approximate Statistically Significant d's at .05 Level Number in Experimental Group with Similiarly sized control group Approximate Figure That d Must Exceed to be Statistically Significant in Percentage Pts. 50 100 250 500 1.000 For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). v v m S Paragraph y Arial Opt X "X C Save All Answers Save and Submit Click Save and Submit to serve and submit. Click Save All Answers to save all answers, MacBook Pro