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shape of the distribution of the time required to get an oil change at a...

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shape of the distribution of the time required to get an oil change at a 20 minute oil change facility is skewec right However records indicate that the mean time is 21 1 minutes and the standard deviation is 4 5 minutes Complete parts a through c a To compute probabilities regarding the sample mean using the normal model what size sample would be required OA The normal model cannot be used if the shape of the distribution is skewed right OB Any sample size could be used OC The sample size needs to be greater than or equal to 30 OD The sample size needs to be less than or equal to 30 Save

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