Question

In: Math

Scroll the bottom arrows to see the whole table. if I make it any smaller you...

Scroll the bottom arrows to see the whole table. if I make it any smaller you will not be able to see the numbers clearly: Is there a relationship between the relative-change* in weight and the relative-change* in Cholesterol level from screening to follow up for patients taking Drug A?

* Relative Change = (Follow up - Initial) / Initial

Patient ID Drug Stomach Pain Sex Age Height Systolic BP Diastolic BP Exercise Coffee Consumption Alcohol Consumption Weight Weight3 Cholesterol Cholesterol3 Triglycerides Triglycerides3 HDL HDL3 LDL LDL3
1 B Yes F 22 67.13 124 78 180 1 > 2 138 145 197 182 152 135 43 34 151.6 145.8
2 B Yes M 22 63 122 70 0 2 < 2 115 122 181 151 59 57 60 48 120.1 102.1
3 B No F 22 72 124 80 90 0 < 2 190 190 190 169 117 86 41 37 147.1 130.6
4 A Yes M 22 69 120 70 120 5 > 2 115 105 131 133 54 72 58 67 72.1 64.8
5 B Yes M 25 73 138 92 40 2 > 2 160 165 172 166 93 139 49 40 121.5 123.8
6 B Yes M 22 67.5 100 72 0 0 < 2 150 165 233 229 176 144 42 38 188.2 188.7
7 A Yes M 23 73 128 78 0 2 < 2 154 150 194 148 79 80 49 26 143.7 120.7
8 A No M 24 71.5 128 74 90 0 < 2 185 187 155 148 89 73 45 50 108.6 96.8
9 A Yes F 23 73.5 124 82 60 1 > 2 178 166 234 175 307 88 28 28 201.1 145.6
10 A Yes M 22 72.25 130 88 40 0 0 158 163 201 203 88 112 50 40 149.6 161.2
11 A No M 26 73 130 86 0 1 < 2 188 195 258 276 299 199 30 21 223.2 251.8
12 A No M 22 64.25 120 74 0 0 > 2 150 150 212 228 52 61 69 60 142.2 167
13 B Yes M 22 64.25 120 74 0 4 0 123 131 137 165 158 147 29 39 105.5 123.6
14 B No F 27 65 100 68 180 2 > 2 138 133 285 229 98 89 69 61 214.4 166.6
15 A No M 22 59 124 84 180 0 > 2 143 140 218 172 101 96 46 21 170.4 149.5
16 B Yes F 24 67.5 122 68 210 1 < 2 139 151 167 152 71 91 51 37 114.9 113.5
17 A Yes F 22 71.5 118 70 60 0 < 2 156 155 170 158 81 91 42 40 126.7 116.5
18 A Yes M 22 69 125 76 180 0 < 2 150 154 157 140 86 88 37 34 118.6 104.6
19 A Yes M 24 68 122 74 100 5 > 2 135 128 215 176 71 53 62 46 151.9 129.2
20 A No M 25 74 134 88 180 0 < 2 219 220 194 207 71 130 40 33 152.9 171.9
21 A No F 28 71 110 80 60 2 > 2 173 173 207 231 107 145 53 47 152.3 181.7
22 A Yes M 22 68.5 116 84 280 0 0 151 165 198 199 80 126 44 46 152.7 151
23 A Yes M 23 75.5 124 73 60 1 0 182 183 189 262 47 230 50 31 138.2 227.3
24 A Yes M 24 70 124 72 360 0 < 2 161 163 216 203 95 121 35 28 179.5 173.1
25 B Yes F 22 72 126 88 120 0 0 176 173 212 173 140 88 43 35 166.8 136.6
26 B Yes F 26 72.5 138 82 0 0 < 2 177 175 175 169 77 78 46 52 127.8 115.8
27 B Yes F 23 72 120 68 60 1 < 2 174 197 158 172 57 126 34 30 123.1 140
28 B No F 20 74 118 76 0 2 0 234 217 115 146 95 110 26 33 87.5 111.2
29 B No F 28 66 138 82 120 0 0 150 160 228 224 480 373 29 28 191.3 190
30 A Yes F 23 74 124 76 60 0 < 2 149 150 164 164 94 92 43 44 119.5 118.5
31 B Yes M 22 70 118 72 0 0 < 2 156 160 149 149 155 65 37 29 109.5 119
32 A Yes F 23 71.5 124 70 180 3 < 2 168 170 211 183 63 60 52 44 158 138
33 B Yes F 22 73 122 76 0 0 < 2 182 170 191 185 99 101 39 39 150.4 144.4
34 B No F 40 75 128 80 0 5 > 2 217 230 277 243 240 218 71 28 202.2 211.5
35 B No M 22 65 128 82 120 1 < 2 190 201 178 191 52 77 41 56 136.2 133.8
36 A Yes F 25 69 124 78 150 5 < 2 159 154 157 112 93 71 41 38 114.5 72.9
37 A No M 22 73 126 73 180 0 0 191 199 151 155 44 94 42 44 108.3 109.5
38 A No M 24 59.5 122 72 100 0 0 140 140 209 165 71 71 41 42 166.9 121.9
39 B No F 23 71 116 72 120 0 0 183 186 209 147 95 124 37 29 170.5 116
40 B Yes F 26 71 132 78 90 0 0 162 167 197 216 47 64 43 43 153.2 172
41 B No M 29 69.5 130 82 0 3 < 2 181 169 226 208 126 86 38 36 186 170.6
42 B No F 30 70 112 72 0 5 < 2 196 199 127 139 116 69 32 31 93.1 106.9
43 A No M 25 65.5 120 72 180 2 > 2 141 143 180 162 85 93 41 46 137.6 114.5
44 B No F 25 74 117 77 0 2 0 230 217 117 146 95 110 25 33 87.5 111.2
45 A Yes M 24 70 122 76 100 5 > 2 135 128 215 177 71 53 62 46 151.9 129.2

Solutions

Expert Solution

There is no linear relationship between relative-change* in weight and the relative-change* in Cholesterol level from screening to follow up for patients taking Drug A at 5% level of significance.

here initial and followup is not mentioned and we assumed that weight3 is followp and weight is initial

similarly for cholesterol3 is followup and cholesterol is initial

The correlation between  relative-change* in weight and the relative-change* in Cholesterol level from screening to follow up for patients taking Drug A is = r=0.3925

now we use t-test for its significance with

Null hypothesis H0:ρ=0 Vs Alternate hypothesis Ha:ρ≠0

ρ is population correlation coefficient.

since the two critical t=1.9556 is less than typical critical t=2.0796 at 5% level of significance, so we fail to reject H0 (or accept H0) and conclude that there is no linear relationship between relative-change* in weight and the relative-change* in Cholesterol level from screening to follow up for patients taking Drug A. ( generally 5% level of significance is taken if it is not mentioned)

n= 23
r= 0.3925
t =r/sqrt((1—r2)/(n—2))= 1.9556
two tailed critical t(0.05, n-2)= 2.0796
two tailed p-value = 0.0639

following information has been generated using the given data

Patient ID Drug Weight(intial) Weight3 (followup) Cholesterol(initial) Cholesterol3(followup) relative change in weight relative change in cholesterol
4 A 115 105 131 133 -0.0870 0.0153
7 A 154 150 194 148 -0.0260 -0.2371
8 A 185 187 155 148 0.0108 -0.0452
9 A 178 166 234 175 -0.0674 -0.2521
10 A 158 163 201 203 0.0316 0.0100
11 A 188 195 258 276 0.0372 0.0698
12 A 150 150 212 228 0.0000 0.0755
15 A 143 140 218 172 -0.0210 -0.2110
17 A 156 155 170 158 -0.0064 -0.0706
18 A 150 154 157 140 0.0267 -0.1083
19 A 135 128 215 176 -0.0519 -0.1814
20 A 219 220 194 207 0.0046 0.0670
21 A 173 173 207 231 0.0000 0.1159
22 A 151 165 198 199 0.0927 0.0051
23 A 182 183 189 262 0.0055 0.3862
24 A 161 163 216 203 0.0124 -0.0602
30 A 149 150 164 164 0.0067 0.0000
32 A 168 170 211 183 0.0119 -0.1327
36 A 159 154 157 112 -0.0314 -0.2866
37 A 191 199 151 155 0.0419 0.0265
38 A 140 140 209 165 0.0000 -0.2105
43 A 141 143 180 162 0.0142 -0.1000
45 A 135 128 215 177 -0.0519 -0.1767
correlation=r= 0.3925
n= 23

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