A study of elephants is conducted to determine the average w

A study of elephants is conducted to determine the average weight of a certain subspecies of elephants. The standard deviation for the population is 500 pounds. At a 87% level, how many elephants need to be weighted so the average weight will be accurate to within 300 pounds? 7 squirrels were found to have an average weight of 9.4 ounces with a sample standard deviation is 0.9. Find the 95% confidence interval of the true mean weight. The winning team\'s score in 13 high school basketball games was recorded. If the sample mean os 54.3 points and the sample standard deviation is 11.0 points, find the 98% confidence interval of the true mean.

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