e a 45. The article "Response of SiG/Si;N, Composites Under Static and Cyclic Loading-An Experimen- tal and Statistical Analysis" (J. of Engr. Materials and Technology, 1997: 186–193) suggests that ten- sile strength (MPa) of composites under specified conditions can be modeled by a Weibull distribu- ac- pt- at in tion with a =9 and o= 180. a. Sketch a graph of the density function. b. What proportion of specimens of this strength values exceeding 175? c. What proportion of specimens of this type have strength values between 150 and 175? d. What strength value separates the weakest 10% of all specimens from the remaining 90%? type have P t

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