Question

some studies of migrating animals measure how far the animals travel in a year by fitting individuals with gps tracking collars. other studies track annual round - trip distance (rtd), which is equal to double the distance separating the two habitats a population migrates between each year. a researcher argues that since gps records all of an animals movements, using the gps method to track a population would result in significantly higher recorded travel distances than using the rtd method would. for example, its very likely that the distance reported for the
which choice most effectively uses data from the table to complete the example?
a caribou would be greater than 2,155 kilometers if the rtd method had been used.
b caribou would be less than 3,807 kilometers if the rtd method had been used.
c white - eared kob would be less than 400 kilometers if the gps method had been used.
d white - eared kob would be greater than 3,807 kilometers if the gps method had been used.

Explanation:

Step1: Analyze each option

• Option A:
• For caribou, RTD distance is \(772\) km. If GPS (which is double RTD as per the researcher's argument \(RTD=\frac{1}{2}GPS\)) had been used, the distance would be \(2\times772 = 1544\) km. \(1544<2155\) (the wolf's GPS - recorded distance). So this option is incorrect.
• Option B:
• For caribou, RTD distance is \(772\) km. If GPS ( \(GPS = 2\times RTD\)) had been used, the distance would be \(2\times772=1544\) km. \(1544>3807\) is false.
• Option C:
• For white - eared kob, RTD distance is \(400\) km. If GPS (\(GPS = 2\times RTD\)) had been used, the distance would be \(2\times400 = 800\) km. \(800<400\) is false.
• Option D:
• For white - eared kob, RTD distance is \(400\) km. If GPS (\(GPS=2\times RTD\)) had been used, the distance would be \(2\times400=800\) km. \(800 > 3807\) is false.
• For wolf, RTD distance is \(2155\) km. If GPS (\(GPS = 2\times RTD\)) had been used, the distance would be \(2\times2155=4310\) km. \(4310>3807\)

Answer:

D. white - eared kob would be greater than 3,807 kilometers if the GPS method had been used.