answer both questions

The tensile strength of silicone rubber is thought to be a function of curing temperature A study was carried out in which samples of 12 specimens of the rubber were prepared using curing temperatures of 20'C and 45'C. The data below show the tensile strength values in megapascals. MPC: 207 2:14 2.22 20 2.21 2.05 2.18 2.09 2.14 2.11 2.02 2.52 2.15 2.49 2.03 2.37 2.05 109 2.42 2.08 2.42 2 20 201 (a) Show a dot plot of the data with both low and high temperature tensile strength values (b) Compute sample mean tensile strength for both samples (c) Does it appear as if curing temperature has an influence on tensile strength, based on the plot? Comment further. (d) Does anything else appear to be influenced by an increase in curing temperature? Explain Consider the drying time data for Exercise 1.1 on page 13 Compute the sample variance and sample standard deviation Reference: Exercise 1.1 The following measurements were recorded for the drying time in hours, of a certain brand of latex paint 34254829 36 2.8 3.356 3.7 2.8 4.4 40523048 Assume that the measurements are a simple random sample (a) What is the sample size for the above sample? (b) Calculate the sample mean for these data (c) Calculate the sample median (d) Plot the data by way of a dot plot (e) Compute the 20% trimmed mean for the above data set trimmed mean? (f) is the sample mean for these data more or less descriptive as a center of location than the