(1 point)
10. A sample of 20 silver dollar coins is weighed. The mean of the sample is 8.0710 g and the standard deviation of the sample is 0.0411 g. Construct a 95% confidence interval estimate of the mean weight of all the coins.

a) 7.6675g
b) 8.0518g
c) 8.0447g
d) 8.0329g