3. The fracture toughness in concrete specimens is a measure of how likely it is that blocks used in new home construction may fail. A construction investigator obtains a random sample of 15 concrete blocks and determines the following toughness values: 0.47 0.58 0.67 0.70 0.77 0.79 0.81 0.82 0.84 0.86 0.91 0.95 0.98 1.01 1.04 Use a normal quantile plot to assess whether the data appear to fit a normal distribution. (using rstudio)