A study of the effect of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to fall asleep. These data are obtained: Smokers: 69.3 56.0 22.1 47.6 53.2...

A study of the effect of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to fall asleep. These data are obtained:

Smokers: 69.3  56.0  22.1  47.6  53.2  48.1  52.7  34.4 60.2  43.8  23.2  13.8

Non Smokers: 28.6  25.1  26.4  34.9  28.8  28.4  38.5  30.2  30.6  31.8  41.6             21.1  36.0  37.9  13.9

i.
By calculating mean for each data, which group do you think have better asleep time taken and why?

ii.
Calculate standard deviation, variance and Co-efficient of variation for each group and compare them.

iii.
Which group having greater value of  relative dispersion and why?

iv.
Solve part (ii) through R also.