Write and solve an equation: In the 2000 Summer Olympics, the United States won 9 more medals than Russia. Together, they won 185 medals.
How many medals did the United States win?

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean