Suppose the force acting on a column that helps to support a building is a normally distributed random variable X with mean value 19.0 kips and standard deviation 1.50 kips. Compute the following probabilities by standardizing and then using a standard normal curve table from the Appendix Tables or SALT. (Round your answers to four decimal places.) A USE SALT (a) P(X S 19) 0.5000 (b) P(X S 20.5) 0.8413 (c) P(X 2 11.5) 1.0000

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