Si 12 determinaciones del calor específico del hierro tienen una desviación estándar de 0.0086, pruebe la hipótesis nula de que s = 0.010 para tales determinaciones. Use la hipótesis alternativa s ≠ 0.010 y el nivel de significancia a = 0.01.

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?