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A leasing firm operates on the belief that the annual mean number of miles driven...

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A leasing firm operates on the belief that the annual mean number of miles driven in its leased cars is 18 500 To see whether this belief is valid a random sample of 15 one year old cars were checked and the sample mean was 19 100 and standard deviation 3 750 miles Which assumptions or conditions are not met for this hypothesis testing problem If all are okay then choose None Randomization Assumption Independence Assumption n big enough

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