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For a random sample of 45 business days, the mean closing price of a certain stock was $113.33. Assume the population standard deviation is $9.91. What is the 90% confidence interval? What is the 95% confidence interval?
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Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?
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For a random sample of 45 business days, the mean closing price of a certain stock was $113.33. Assu...
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