1.105 Normal random numbers.
Use software to generate 100 observations from the standard Normal distribution. Make a histogram of these observations. How does the shape of the histogram compare with a Normal density curve? Make a Normal quantile plot of the data. Does the plot suggest any important deviations from Normality? (Repeating this exercise several times is a good way to become familiar with how Normal quantile plots look when data are actually close to Normal.)
1.105
(a) For those who get enough sleep, 56.8% are high exercisers and 43.2% are low exercisers. (b) For those who don't get enough sleep, 37.9% are high exercisers and 62.1% are low exercisers. (c) Those who get enough sleep are more likely to be high exercisers than those who don't get enough sleep.