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Determine the mean amount of juice dispensed

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A bottle-filling machine is set to dispense 12.1 fluid ounces into juice bottles. To ensure that the machine is filling accurately, every hour a worker randomly selects four bottles filled by the machine during the past hour and measures the contents. If there is convincing evidence that the mean amount of juice dispensed is less than 12.1 ounces, the machine is shut down for recalibration. It can be assumed that the amount of juice that is dispensed into bottles is normally distributed. During one hour, the mean number of fluid ounces of four randomly selected bottles was 12.05 and the standard deviation was 0.085 ounce. Perform a test of significance to determine whether the mean amount of juice dispensed is less than 12.1 fluid ounces. Assume the conditions for inference are met.

Reference no: EM132855108

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