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Apply the dependent-samples t-test to the data in given Exercise. Is the conclusion consistent with the one reached in that exercise? Explain.

Exercise
Two different machine control-button configurations are being tested. Recognizing that some operators are faster than others, management uses seven operators as blocks, then has each operator carry out a standard operation using each control-button layout.

Each operator proceeds from one treatment to the next in a random order, and the times for completion of the operation are shown here. At the 0.05 level, determine whether the treatment effects of the two layouts could be zero.

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