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The article “Concrete Pressure on Formwork” (Mag. Of Concrete Res., 2009: 407–417) gave...

The article “Concrete Pressure on Formwork” (Mag. Of Concrete Res., 2009: 407–417) gave the following observations on maximum concrete pressure (kN/m2):

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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