1.2. (2 points) For a sample standard deviation, use Excel function STDEV.S(), not STDEV.P(). Fill in the blanks below: Karlsruhe Method Lehigh Method S, = 1 n, =6 n, =i 1.3. (2 points) Do the data suggest that the two methods provide the same mean shear strength? Use a = 0.05. Find the P-value rounded to 6 decimal places (using Microsoft Excel.) 1.4. (2 points) Find a 95% confidence interval on the mean difference between the two methods and use it to answer the question in 1.3