We are testing a new drug, and we want to know whether the drug changes people's reaction time. We randomly select 30 participants and record how much time (in seconds) it takes for them to react to a surprising stimulus without the drug. The following day, each participant consumes the drug, and we record the change in reactiontimecompared to the day before.

Construct a two-sided 95% confidence interval for the mean change in reaction time. What is the lower bound? Round your answer to three decimal places.

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