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Mathematics, 31.03.2021 21:10 nnekas

According to a flyer created by Broadway Party Rental. com, their 18-inch helium balloons fly. on average, for 32 hours. You purchase a SRS of 50 18-inch helium balloons from this
company and record how long they fly. You would like to know if the actual mean flight time
of all balloons differs from the advertised 32 hours.

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According to a flyer created by Broadway Party Rental. com, their 18-inch helium balloons fly. on a...
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