A quality control engineer measures the resistance of 11 resistors taken from a batch of 1000resistors. The resistances are: 58.1, 72.3, 74.3, 74.6, 76.4, 77.8, 80.1, 80.9, 82.1, 82.3 and

89.on a) Are there any outliers in the data set? If so, identify and remove them. How manymeasurements are left? Based on the measurements that are left, estimate the population mean and itsconfidence interval to 95% confidence. Assume the resistances are approximatelynormally distributed.