To be considered for pilot school, 12 students took a spatial reasoning test that resulted in this list of scores. find the value of the 90th percentile.
152    121    130    143    122    101    137    98    138    127    145    117
11
101
143
145

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?