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f What is the shape of the sampling distribution of the sample mean Select an...

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f What is the shape of the sampling distribution of the sample mean Select an answer Why Check all that apply population is not normal On is at least 30 Do is known Do is unknown On is less than 30 population is normal g Find the probability that the sample mean lifetime of the 20 randomly selected dishwashers is less than 11 6 years Round final answer to 4 decimal places DO NOT use the rounded standard deviation from part e in this computation Use the EXACT value of the standard deviation with the square root A h Find the probability that the sample mean lifetime of the 20 randomly selected dishwashers is less than 11 4 years Round final answer to 4 decimal places DO NOT use the rounded standard deviation from part e in this computation Use the EXACT value of the standard deviation with the square root i Is a mean lifetime of 11 4 years unusually low for 20 randomly selected dishwashers Select an answer

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