Consider the following observations on shear strength (MPa) of a joint bonded in a particular manner. 22.2 40.4 16.4 72.0 30.0 36.6 4.4 33.1 66.7 81.5 108.2 (a) What are the values of the fourths? (Enter your answers to two decimal places.) lower fourth upper fourth 22.6 72.6 What is the value of fs? 50 MPa MPa MPa (b) Construct a boxplot based on the five-number summary. 20 60 80 100 40 80 100 40 60 80 100 20 40 60 80 100 Comment on its features. (Select all that apply.) The data is symmetric. There are no outliers. There are outliers. The variation is small. There is a slight positive skew to the data. The variation seems quite large. There is a slight negative skew to the data. (c) How large or small does an observation have to be to qualify as an outlier? (Round your answers to one decimal place.) below above -52.4 147.6 MPa MPa How large or small does an observation have to be to qualify as an extreme outlier? (Round your answers to one decimal place.) below above MPa MPa (d) By how much could the largest observation be decreased without affecting fs? Hint: If the largest observation was changed to 0, then the upper fourth would change, and so fs would also change. So the question can be rephrased: By how much could the largest observation be reduced without changing the upper fourth? MPa