In the coordinate plane JKL has the coordinates at J(7, 7), K(3, -1), and L(-3, 5). If the triangle is reflected across the x-axis, what are the coordinates of J’K’L’?

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