The silicon content (as a weight percent) of six different rock samples (eacfh was measured by two different methods. answer the following questions to results that are significantly different at the 95% confidence level determine if the two methods give what is tcalculated? sample method a method b 11.570 11.520 15.380 17.950 22.840 25.110 27.070 number 2 15.280 17.840 22.830 25.180 27.010 0.267 what is table? 5 number 2.570 are these methods significantly different at the 95% confidence level? the methods are not significantly different at the 95% confidence level. the methods are significantly different at the 95% confidence level.