Mathematics, 05.05.2020 17:05 yeroo860
A mixture of pulverized fuel ash and Portland cement to be used for grouting should have an average compressive strength of more than 1300KN=m2. The mixture will not be used unless experimental evidence indicates conclusively that the strength specification has been met. Suppose compressive strength for specimens of this mixture has standard deviation ? = 60. Let ? denote the true average compressive strength.
Answers: 1
: μ 1300, 
: μ > 1300
=20.50277
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A mixture of pulverized fuel ash and Portland cement to be used for grouting should have an average...
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