please Answer number 3 only
Electric and plug-in electric cars are designed to save gasoline and help the environment. In addition, there are certain tax credits for these types of hybrid automobiles. Although there are certainly benefits to owning a hybrid car, many people complain about the slow acceleration, repair expense, and overall comfort. Thirty-five passengers are randomly selected. Each is blindfolded and taken for a ride in a traditional combustion-engine automobile and in a comparably sized hybrid car (over the same route). The passenger is then asked to select the car with the most comfortable ride.
1. this is an experimental study
2. the variable is the comfort of each car
3. Describe possible sources of bias in these results.
3. Here the variable comfort has not been defined properly, and hence the person who is blindfolded and taken for a ride does not know the parameters of comfort. That is how to measure the comfort level. Hence the person may not be knowing how to answer it. It may happen that he/she may not have experience of riding the types of car. So the answer may be a biased one.
As the ride is given by a driver who may not run the two different types of cars with equal speed, and thus a bias can come from there.
please Answer number 3 only Electric and plug-in electric cars are designed to save gasoline and...
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