The tensile strength of UK cement is being studied. Four different mixing techniques can be used economically. A completely randomized experiment was conducted and the following data were collected: Mixing Technique Tensile Strength (Ib/in) 1 3129 3000 2865 2890 2 3200 3300 2975 3150 2800 2900 2985 3050 4 2600 2700 2600 2765 a) Obtain confidence intervals for Di = and D2 = u2 - u3; use the Bonferroni procedure with a 95% joint confidence. 1 34

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Q: 2= c2  + c

A: 2=C2+C We need to solve the equation.

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