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1. A stats class flips a certain type of thumb tack that is known to end up point up 60% of the time. Everyone

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1. A stats class flips a certain type of thumb tack that is known to end up "point up " 60% of the time. Everyone in the class does this 50 times. Which is the correct mean and standard deviation for the sampling distribution of the proportion of flips that this type of thumb tack comes up "point up"

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