An agricultural researcher wanted to test the effectiveness of two types of fertilizers. She compared the output of two samples of tomato plants- one sample used Fertilizer A, the other used Fertilizer B.

Fertilizer A = 85 lbs. s = 5 lbs. n = 40

Fertilizer B = 78 lbs. s = 6 lbs. n = 36

Perform a hypothesis test at 95% confidence to determine if the two fertilizers are equally effective.To get full credit you must do the following:

• State your null and alternate hypotheses.
• Show either the test statistic and p-value OR the confidence interval.
• State whether you reject the null hypothesis.
• Answer the question: could the two population means be equal? YES or NO