Question

Four different types of insecticides are used on strawberry plants. The number of strawberries on each randomly selected plant is given below.

Insecticide 1	Insecticide 2	Insecticide 3	Insecticide 4
6	5	6	6
7	7	5	5
6	5	4	4
5	4	3	4
7	5	4	5
6	6	4	3

1. Does the data suggest that any of these insecticides yield a mean number of strawberries per plant that is different from the others? Use a 5% level of significance and be sure to verify the requirements for the test.

2. Construct side-by-side boxplots of the data resulting from each type of insecticide. Do they provide visual support for your decision in part a? Explain.   

(Hint: In StatCrunch under Other options: select Draw boxes horizontally. This will make the boxplots much easier to analyze.)

Answer 1

2.0 40.31 31-36 neon Stoev 6.353 5 333, 6.99 1033 503, 6 163) 0333.503, 5.163) neon 951. С nsecticide 6, 16 nsecticidez Insecticide3 6 InsectiCide6 Pooled stg ev-0-9: 46 5.333 -333 o 3.620, 5 330) conce ho s vejected stiosoe ie per Plant thetis plant thot is dseent or theinsecticides OY