When a molecule has its bonds break, it sometimes gives off energy. this energy is the absorbed by the matter around it, increasing the speed of the molecules. how is this increased speed in the molecules measured?

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