Solved: The article “Concrete Pressure on Formwork” (Mag.
Chapter 7, Problem 46E(choose chapter or problem)
The article “Concrete Pressure on Formwork” (Mag. of Concrete Res., 2009: 407–417) gave the following observations on maximum concrete pressure \((kN/m^2 )\):
33.2 41.8 37.3 40.2 36.7 39.1 36.2 41.8
36.0 35.2 36.7 38.9 35.8 35.2 40.1
a. Is it plausible that this sample was selected from a normal population distribution?
b. Calculate an upper confidence bound with confidence level 95% for the population standard deviation of maximum pressure.
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