The article Concrete Pressure on Formwork (Mag.of Concrete Res., 2009: 407417) gave the
Chapter 7, Problem 46(choose chapter or problem)
The article Concrete Pressure on Formwork (Mag.of Concrete Res., 2009: 407417) gave the followingobservations on maximum concrete pressure (kN/m2):33.2 41.8 37.3 40.2 36.7 39.1 36.2 41.836.0 35.2 36.7 38.9 35.8 35.2 40.1a. Is it plausible that this sample was selected from anormal population distribution?b. Calculate an upper confidence bound with confidencelevel 95% for the population standard deviationof maximum pressure.
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