In an effort to characterize the New Guinea crocodile (Crocodylus novaeguineae), measurements were taken of the dorsal cranial length (mm) (the length of the skull from the tip of the nose to the back of the cranial cap, denoted DCL) and the total length (cm) (denoted TL) of 50 harvested adult males. Is this most accurately categorized as an observational or experimental study? Discuss how you would obtain a properly randomized sample of 50 such animals in the particular geographical region of New Guinea that forms their habitat. TL DCL Observation 130 169 1 102 154 2 126 160 3 230 290 4 115 151 5 150 209 6 259 344 7 130 183 8 110 153 9 130 183 10 185 237 11 215 288 12 129 187 13 149 189 14 156 203 15 100 143 16 224 294 17 234 318 18 162 229 19 217 299 20 206 283 21 144 198 22 146 203 23 166 229 24 203 275 25 205 266 26 252 350 27 238 318 28 250 330 29 255 351 30 120 169 31 250 332 32 238 307 33 157 205 34 159 216 35 202 261 36 177 237 37 221 288 38 224 294 39 167 232 40 240 316 41 207 268 42 192 242 43 180 248 44 165 226 45 197 267 46 113 162 47 131 183 48 162 234 49 246 310 50
In an effort to characterize the New Guinea crocodile (Crocodylus novaeguineae), measurements were taken of the dorsal cranial length (mm) (the length of the skull from the tip of the nose to the back of the cranial cap, denoted DCL) and the total length (cm) (denoted TL) of 50 harvested adult males.
Is this most accurately categorized as an observational or experimental study? Discuss how you would obtain a properly randomized sample of 50 such animals in the particular geographical region of New Guinea that forms their habitat.
TL DCL Observation
130 169 1
102 154 2
126 160 3
230 290 4
115 151 5
150 209 6
259 344 7
130 183 8
110 153 9
130 183 10
185 237 11
215 288 12
129 187 13
149 189 14
156 203 15
100 143 16
224 294 17
234 318 18
162 229 19
217 299 20
206 283 21
144 198 22
146 203 23
166 229 24
203 275 25
205 266 26
252 350 27
238 318 28
250 330 29
255 351 30
120 169 31
250 332 32
238 307 33
157 205 34
159 216 35
202 261 36
177 237 37
221 288 38
224 294 39
167 232 40
240 316 41
207 268 42
192 242 43
180 248 44
165 226 45
197 267 46
113 162 47
131 183 48
162 234 49
246 310 50
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