PARTICIPATION ACTIVITY 4.7.2: Confidence interval. The weights of 5 squash (in pounds) are 10, 17, 17.5, 18.5, and 19.5. The sample weights have a mean of x = 16.5. The accepted population standard deviation for this type of squash is o = 1.25. 1) What is the margin of error at the 90% confidence level? Type as D Check Show answer 2) What is the margin of error at the 99% confidence level? Type as: Check Show answer 3) What is the 90% confidence interval? Type as: [##.### ## ###] Check Show answer 4) What is the 99% confidence interval? Type as: [## ###, ##.###] D Check Show