What is the substance of air

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Explanation:

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Given"
mean: 17,123
mean absolute deviation: 611

We simply need to add and subtract the mean absolute deviation to and from the mean value to get the possible numbers of riders for week 5 that are within the mean absolute deviation.

17,123 + 611 = 17,734
17,123 - 611 = 16,512

The number of possible riders for week 5 will be between 16,512 and 17,734.