An exam has a mean of 70 with a standard deviation of 10. Use Chebyshev's Theorem to find a lower bound for the number of students in a class of 400 who scored between 50 and 90.
Answer to relevant QuestionsThe mean monthly rent of students at Oxnard University is $875 with a standard deviation of $219. (a) John's rent is $1,325. What is his standardized z-score? (b) Is John's rent an outlier? (c) How high would the rent have ...CitiBank recorded the number of customers to use a downtown ATM during the noon hour on 32 consecutive workdays. (a) Use Excel or MegaStat to sort and standardize the data. (b) Based on the Empirical Rule, are there ...An executive's telephone log showed the lengths of 65 calls initiated during the last week of July. (a) Use Excel to find the quartiles. What do they tell you? (b) Find the midhinge. What does it tell you? (c) Make a box ...Based on experience, the Ball Corporation's aluminum can manufacturing facility in Ft. Atkinson, Wisconsin, knows that the metal thickness of incoming shipments has a mean of 0.2731 mm with a standard deviation of 0.000959 ...The U.S. Postal Service will ship a Priority Mail ® Large Flat Rate Box (120 3 120 3 5 1 / 2 0) anywhere in the United States for a fixed price, regardless of weight. The weights (ounces) of 20 randomly chosen boxes are ...
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