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In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule.
1) the top 10% receive A
2) the next 20% receive B
3) the middle 40%receive C
4) the next 20% receive D
5) the bottom 10% receive F.
Find the lowest score on the final exam that would qualify a student for an (A, B, C, D)
A bus arrives at a bus stop at a uniformly distributed time over the interval 0 to 1 hour. A passenger also arrives at the bus stop at a uniformly distributed time over the interval 0 to 1 hour.
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Assume that a 95% confidence interval for the mean is 14.5
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What can you conclude regarding the information? Who tends to order the most or least number of condiments?
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