A point B at (1,2,3) in 3D cartestian system. what is it's new coordinate after rotating 60 degree anti clockwise along the z axis. are the new coordinate same if rotation is clockwise. use 3d matrix rotation and matrix product

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?