Yield strengths of circular tubes with end caps are measured. The first yields (in kN) are as follows: 96, 102, 104, 108, 126, 128, 150, 156 (a) Calculate the sample average. (b) Calculate the sample standard deviation.

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling