Question: Occupation and diet, continued. Use the data in the previous exercise to give two confidence intervals: (a) A 90% confidence interval for the mean daily

Occupation and diet, continued. Use the data in the previous exercise to give two confidence intervals:

(a) A 90% confidence interval for the mean daily alcohol consumption of London double-decker bus conductors.

(b) An 80% confidence interval for the difference in mean daily alcohol consumption between drivers and conductors.

(c) Write a one-sentence description of each of the confidence intervals calculated above.

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