A group of students wish to examine how pesticides affect seedling growth. Seeds are randomly assigned to...

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A group of studentswish to examine how pesticides affect seedling growth. Seeds arerandomly assigned to be planted in pots with soil treated withpesticide (treatment group, group 1) or in pots with untreated soil(control group, group 2). Seedling growth (in mm) is recorded after2 weeks. The data for each group is given below.
Pesticide Group (Group 1) Untreated Group (Group 2)
24 71 42 26
61 49 33 54
59 54 46 60
46 43 37 28
43 53 43 62
44 57 41 20
52 49 10 53
43 56 42 48
58 33 55 37
67 19 85
62 17 42
57 55
Is there evidence thatthe average growth in mm differs between the pesticide anduntreated groups?
What is the value ofthe test statistic?
The p-value?

Answer & Explanation Solved by verified expert

4.3 Ratings (675 Votes)

Solution Here we have to use two sample t test for the difference between two population means H0 1 2 versus Ha 1 2 This is a two tailed test Test statistic formula See Answer

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Pesticide Group (Group 1)		Untreated Group (Group 2)
24	71	42	26
61	49	33	54
59	54	46	60
46	43	37	28
43	53	43	62
44	57	41	20
52	49	10	53
43	56	42	48
58	33	55	37
67		19	85
62		17	42
57		55