A study was carried out to determine if curing temperature significantly affects tensile strength of silicone rubber. An axially controlled automated hydraulic force applicator was employed to measure the tensile strength (in mega-pascals, MPa) of each of the specimens. The Results are given below.
Temperature (Celsius)
at 25 Celsius - 2.09, 2.14, 2.18, 2.05, 2.18, 2.11
at 40 Celsius - 2.22, 2.09, 2.10, 2.02, 2.05, 2.01
at 55 Celsius - 2.03, 2.22, 2.10, 2.07, 2.03, 2.15
a.) test the hypothesis that the curing temperatures affect the tensile strength of the silicone rubber.Use a P-value approach.
b.) Construct a box plots of the data. Do these support your conclusions. Explain