A farm manager wants to test a manufacturer’s claim that cheaper fertilizer A is at least as effective as more expensive fertilizer B. Twenty identical plots of strawberries are randomly selected. Half are fertilized with A and half with B. The yields are to be recorded and a statistical test at the 5 percent significance level is to be made. The eventual results of the experiment are as follows:

Fertilizer A		Fertilizer B
Plot Number	Strawberry Output (quarts)	Plot Number	Strawberry Output (quarts)
3	91	1	79
4	97	2	90
7	85	5	80
9	88	6	95
11	86	8	83
12	93	10	93
13	80	14	85
15	81	16	80
18	81	17	82
20	90	19	84

  

Rubrics 1. Correct null and alternative hypothesis - 10 points 2. Decision on one-tailed or two-tailed test-5 points 3. Correct test and correct formula to conduct the test - 20 points 4. Correct computations of appropriate statistics - 10 points 5. Correct test statistic -25 points 6. Correct critical value - 5 points