Battery lifetime is normally distributedfor large samples. The mean lifetimeis 500 days and the standard deviation is 61days. To the nearest percent, what percentof batteries have lifetimes longer than 561days?
A sampling distribution used toestimate a population proportion,p, yielded a value of 0.25. Find themargin of error that corresponds to asample size of 600 and a confidencelevel of 95%. (round to 3 decimal places)