Question

Classify the two given samples as independent or dependent.Sample​ 1:The gas mileage for 48 trucksThe gas mileage for 48 trucks nothingSample​ 2:The gas mileage for the same 48 trucks after receiving a tuneupThe gas mileage for the same 48 trucks after receiving a tuneup nothingChoose the correct answer below.A.The two given samples are independent because different vehicles were sampled.B.The two given samples are dependent because the same vehicles were sampled.C.The two given samples are independent because the same vehicles were sampled.D.The two given samples are dependent because different vehicles were sampled.

Answer 1

Option B

Explanation:

The two samples are paired as the gas mileage of 48 trucks is measured for before tuneup and after tuneup. The gas mileage of 48 trucks will be affected by receiving tuneup. As the same 48 trucks are selected for tuneup, so the sample will be dependent. Hence the two samples are dependent because the same trucks are sampled.