it says you must understand the MannWhitney U test please he

it says you must understand the Mann-Whitney U test. please help.

hapter en 10.14 Seven tomato plants were treated with chlo- 1 rogenic acid to determine if this would influ- ence the activity of the enzyme o-diphenol oxidase in the leaves. A control group of seven plants were not treated. We do not know if this variable is approximately nor- mally distributed, nor is it possible to deter- mine this with a sample as small as this. Does this treatment affect activity of the enzyme? Treated 35 45 36 Untreated 10 18 29 17 41 29 38 TEST YOURSELF Cheose and conduct the appropriate statistical

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