Use the Tornadoes Data and your statistical expertise to answer the questions: I
ID: 3054385 • Letter: U
Question
Use the Tornadoes Data and your statistical expertise to answer the questions: Is it reasonable to claim that the number of tornadoes in April will affect the number of tornadoes in August? 1. What test/procedure did you perform? a. One-sided t-test b. Two-sided t-test c. Regression d. ??Confidence interval 2. What is the relevant P-Value/margin of error? a. 1.7981E-05 b. 8.17505E-06 c. 4.08753E-06 d. 0.05370006 e. ??None of these 3. Statistical Interpretation a. Since P-value is very small we are confident that the tornadoes in April will influence the tornadoes in August. b. Since P-value is not small we cannot claim that the tornadoes in April will influence the tornadoes in August. c. Since P-value is very small we are confident that the average numbers of tornados are different. d. ??None of these. 4. Conclusion a. Yes, I am confident that the above assertion is reasonable. b. No, I cannot claim that the above assertion is reasonable. DATA: Apr Aug 15 13 26 27 37 16 47 24 113 49 99 33 85 42 216 20 76 46 30 38 70 48 74 27 41 51 84 26 157 79 123 61 80 58 149 28 102 66 68 70 117 55 75 50 96 59 150 51 267 107 108 60 113 38 88 82 107 65 123 126 137 73 84 64 150 34 65 76 176 47 134 108 84 67 20 63 58 61 82 36 108 60 204 46 53 115 85 112 205 120
Explanation / Answer
> data1=read.csv(file.choose(),header=T)
> data1=read.csv(file.choose(),header=F)
> data1
V1
1 15
2 13
3 26
4 27
5 37
6 16
7 47
8 24
9 113
10 49
11 99
12 33
13 85
14 42
15 216
16 20
17 76
18 46
19 30
20 38
21 70
22 48
23 74
24 27
25 41
26 51
27 84
28 26
29 157
30 79
31 123
32 61
33 80
34 58
35 149
36 28
37 102
38 66
39 68
40 70
41 117
42 55
43 75
44 50
45 96
46 59
47 150
48 51
49 267
50 107
51 108
52 60
53 113
54 38
55 88
56 82
57 107
58 65
59 123
60 126
61 137
62 73
63 84
64 64
65 150
66 34
67 65
68 76
69 176
70 47
71 134
72 108
73 84
74 67
75 20
76 63
77 58
78 61
79 82
80 36
81 108
82 60
83 204
84 46
85 53
86 115
87 85
88 112
89 205
90 120
> attach(data1
+ )
> April=V1[seq(1,90,by=2)]
> Aug=V1[seq(2,90,by=2)]
> April
[1] 15 26 37 47 113 99 85 216 76 30 70 74 41 84 157 123 80 149 102
[20] 68 117 75 96 150 267 108 113 88 107 123 137 84 150 65 176 134 84 20
[39] 58 82 108 204 53 85 205
> Aug
[1] 13 27 16 24 49 33 42 20 46 38 48 27 51 26 79 61 58 28 66
[20] 70 55 50 59 51 107 60 38 82 65 126 73 64 34 76 47 108 67 63
[39] 61 36 60 46 115 112 120
> cor.test(April,Aug)
Pearson's product-moment correlation
data: April and Aug
t = 1.9837, df = 43, p-value = 0.0537
alternative hypothesis: true correlation is not equal to 0
95 percent confidence interval:
-0.004354878 0.537407473
sample estimates:
cor
0.2895492
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