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Homework answers / question archive / Engineering Probability and Inference Homework 1 On average, a certain pesticide contains 2% toxic material
Engineering Probability and Inference Homework 1
Texas: 4.69 5.10 5.22 4.46 4.93 4.65 5.22 4.76 4.25 5.14
Illinois: 4.40 4.69 4.22 4.64 4.54 4.35 4.69 4.40 4.75 4.93 4.45 4.49
Use a significance level of 5% to test the claim that there is a difference between the acidity rates. You can assume the population variances are equal and that the populations are normally distributed.
Sample |
1 |
2 |
3 |
4 |
5 |
Instrument 1 |
4 |
9 |
8 |
3 |
6 |
Instrument 2 |
5 |
7 |
6 |
5 |
4 |
Oak: 1.72 0.67 1.55 1.56 1.42 1.23 1.77
Pine: 0.98 1.40 1.33 1.52 0.73 1.20 1.48
Use the Wilcoxon Rank Sum Test at a 0.05 level to test for a difference in true average burn time for the two types of wood.
Before |
45 |
60 |
46 |
119 |
33 |
57 |
83 |
29 |
26 |
17 |
After |
36 |
73 |
44 |
124 |
35 |
51 |
77 |
34 |
24 |
11 |