A particular machine manufactures rubber gaskets with outside diameters that vary according to a normal distribution. To estimate the mean outside diameter of all gaskets produced by this machine during a production run, a quality control engineer randomly selects 10 gaskets. In a random sample of 10 gaskets, the average diameter is x = 41.79 cm with a standard deviation of sx = 0.21cm.

Calculate a 95% confidence interval for the mean outside diameter of all gaskets produced by this machine.