Question

Data has been kept on interest rates since the 1950s, so use the historic average here to construct a the 95% confidence interval of the population mean. 3.How many standard deviations below the mean is the rate for 2014?7.38,8.04,9.19,9.04,8.87,8.84,9.64,11.19,13.77,16.63,16.08,13.23,13.87,12.42,10.18,10.20, 10.34,10.32,10.13,9.25,8.40,7.33,8.36,7.96,7.81,7.60,6.94,7.43,8.06,6.97,6.54,5.82,5.84,5.87, 6.41,6.34,6.04,5.04,4.69,4.46,3.66,3.98,4.17