PLEASE HELP Choose all properties that were used to simplify the following problem:
2/7 . 53 . 7/2
53 . 2/7 . 7/2
53 . 1
53
~associative property of multiplication
~commutative property of addition
~associative property of addition
~distributive property
~multiplicative inverse
~commutative property of multiplication
~multiplicative identity

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?