Is this correct, if it’s not, please correct it. 0.75+0.60+0.25-0.20
(0.60-0.20)+(0.75+0.25) 《ー commutative property
0.40-(-1) 《ー additive inverse
1.40

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?