Question

Which of the following is not an example of dependent samples?

Multiple Choice

• Before and after weights for 30 individuals enrolled in a diet and exercise program

• One hundred cars are selected and their mileage is recorded. The owners are then given an additive to improve mileage and the new mileage results are recorded

• Before and after results for 45 patients who took a drug designed to lower blood pressure

• The number of calories in an equal number of 4 oz bags of kettle cooked chips and baked chips.

Answer 1

We know that before and after case for any data sample is always a case of dependent samples as we use the same sample data for recording to measurement, i.e. before and after measurement. So, option A and C are dependent samples

option B is also an example of dependent samples because the same set of cars is used twice for taking mileage measurements. This means that we are using same cars for two different measurement, so it is also a case of dependent sample.

option D is not a case of dependent samples because we have two independent samples, i.e. one sample for baked chips and another sample for cooked chips

option D is correct answer