Which expression can be used to find the difference of the polynomials? (4m – 5) – (6m – 7 + 2n) (4m – 5) + (6m + 7 + 2n) (4m – 5) + (–6m + 7 + 2n) (4m – 5) + (–6m – 7 – 2n) (4m – 5) + (–6m + 7 – 2n)

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