A statistics professor made the following histogram for the scores on her class’s first exam.   If a passing score is 70 or above, what percent of the students passed the exam? 50% 25% It is impossible to determine from the histogram. 75%

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2.What percentage of data is represented by the shaded area? Enter your answer as a number, like this: 42%

The test for a certain disease is 86% accurate.  A hospital tests a sample of 5000 patients for this disease and the incidence rate of the disease is 12%. Fill in the following table showing the results of this disease testing.   Disease No Disease Total Test Positive       Test Negative       Total       A. What percent of these patients tests positive? Round to the nearest 0.1%.   C. If a patient tests negative, what is the percent chance they have the disease? Round to the nearest 0.1%   D.Suppose you select a patient at random from this sample, what is the probability the patient has the disease or tests positive? Use three significant digits.