In the Netherlands, healthy males between the ages of 65 and 79 have a distribution of serum uric ac

In the Netherlands, healthy males between the ages of 65 and 79 have a distribution of serum uric acid levels that is approximately normal with mean mu = 341 mu mol/l and standard deviation sigma = 79 mu mol/l [9]. What proportion of the males have a serum uric acid level between 300 and 400 mu mol/l? What proportion of samples of size 5 have a mean serum uric acid level between 300 and 400 mu mol/l? What proportion of samples of size 10 have a mean serum uric acid level between 300 and 400 mu mol/l? Construct an interval that encloses 95% of the means of samples of size 10. Which would be shorter, a symmetric interval or an asymmetric one?

 

 

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