A transport company runs 21 coaches between two cities every week In the past, the mean and variance of the journey times were 4 hours 35 minutes and 53 29minutes 2 What would be the mean and standard deviation of the times if all the coaches departed 10 minutes later and arrived 5 minutes earlier ...

The mean and standard deviation of journey times would be 4 hours 4 ...

A transport company runs 21 coaches between two cities every week. In the past, the mean and

Question:

A transport company runs 21 coaches between two cities every week. In the past, the mean and variance of the journey times were 4 hours 35 minutes and 53.29minutes².

What would be the mean and standard deviation of the times if all the coaches departed 10 minutes later and arrived 5 minutes earlier than in the past?

Are there any situations in which achieving this might actually be possible?

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