What is the average car mass ignoring 0kg entries?

What is the average car mass ignoring 0kg entries?

• A. 1300kg
• B. 1404kg
• C. 1500kg
• D. 1350kg

Answer: (B)

The idea being tested is how to find the mean mass when some entries are zero and should be ignored. To get the average, add up all the car masses that are non-zero and then divide by how many non-zero masses there are. Zeros don’t represent actual cars in this context, so including them would pull the average down. For example, if you have non-zero masses like 1300 kg, 1500 kg, and 1600 kg, you would do (1300 + 1500 + 1600) ÷ 3 = 4400 ÷ 3 ≈ 1467 kg. This shows how removing zeros changes the result to reflect only the observed cars. In the dataset used for this question, removing the 0 kg entries and computing the mean of the remaining masses gives 1404 kg, which is the value you’d report as the average car mass after ignoring zeros. Including the zeros would produce a smaller overall average.

The idea being tested is how to find the mean mass when some entries are zero and should be ignored. To get the average, add up all the car masses that are non-zero and then divide by how many non-zero masses there are. Zeros don’t represent actual cars in this context, so including them would pull the average down.

For example, if you have non-zero masses like 1300 kg, 1500 kg, and 1600 kg, you would do (1300 + 1500 + 1600) ÷ 3 = 4400 ÷ 3 ≈ 1467 kg. This shows how removing zeros changes the result to reflect only the observed cars.

In the dataset used for this question, removing the 0 kg entries and computing the mean of the remaining masses gives 1404 kg, which is the value you’d report as the average car mass after ignoring zeros. Including the zeros would produce a smaller overall average.