What is the mean hydrocarbon emissions (hc) in g/km?

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Multiple Choice

What is the mean hydrocarbon emissions (hc) in g/km?

Explanation:
The mean is the average of all the hydrocarbon emission measurements, giving a single representative value in grams per kilometre. Here, the average is 0.053 g/km, which captures the typical emission level across the data. The version with an extra trailing zero would suggest more precision than the data support, so it isn’t the standard way to report the mean. The other two values are off by a factor of ten: one is ten times smaller, and the other ten times larger. So 0.053 g/km is the correct mean.

The mean is the average of all the hydrocarbon emission measurements, giving a single representative value in grams per kilometre. Here, the average is 0.053 g/km, which captures the typical emission level across the data. The version with an extra trailing zero would suggest more precision than the data support, so it isn’t the standard way to report the mean. The other two values are off by a factor of ten: one is ten times smaller, and the other ten times larger. So 0.053 g/km is the correct mean.

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