Mathematics, 13.07.2020 23:01 davidoj13

A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compression strength of more than 1300 KN/m^2. 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 is normally distributed with \sigma =60. Let \mu denote the true average compressive strength. What are the appropriate null and alternative hypothesis?

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A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compressi...