A larger sample of 92 roller coaster maximum speeds has a mean of 85.9 km/h and a
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A larger sample of 92 roller coaster maximum speeds has a mean of 85.9 km/h and a standard deviation of 28.7 km/h. What is the z score for a speed of 34 km/h? Does the z score suggest that the speed of 34 km/h is significantly low?
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