題組內容

5. (15 points) Three different machines are being considered for use in man nufacturing rubber seals. The of five seals from each machine is nsed to d machines are being compared with respect to tensile strength of the product. A random sample machine to machine. The company want to know whether or not the mean tensile strength is the o determine whether the mean tensile strength varies from sarne for all three machines. 
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(b) Please state the null and alternative bypothesis, perform the test, and state your conclusion using 0.05 level of significance. (5 pointe)