Suppose that, for a certain exam, a teacher grades on a curve. Frequency 2.2% 2.

Question

Suppose that, for a certain exam, a teacher grades on a curve. Frequency 2.2% 2.2% 0.1% 34.1% 34.1% 0.1% | 13.6% 13.6% A-30 -20 -lo puu+lo p+20 pu+30 It is known that the mean is 70 and the standard deviation is 5. There are 45 students in the class. An-Nur If an exam paper is selected at random, what is the probability that it will be a failing paper? (Round your answer to three decimal places.) 2.2% 2.2% 0.1% 34.1% 34.1% 0.1% 21 13.6% 13.6% 55 73 82 91 F » De - C- > BE A Anna Maribor 64 p-30 1-20 1-lo u pu+lo pu+20 pu+30 FIGURE 14.37 Grade distribution for a class “graded on a curve"

Explanation / Answer

Suppose that, for a certain exam, a teacher grades on a curve. Frequency 2.2% 2.2% 0.1% 34.1% 34.1% 0.1% | 13.6% 13.6% A-30 -20 -lo puu+lo p+20 pu+30 It is known that the mean is 70 and the standard deviation is 5. There are 45 students in the class. An-Nur If an exam paper is selected at random, what is the probability that it will be a failing paper? (Round your answer to three decimal places.) 2.2% 2.2% 0.1% 34.1% 34.1% 0.1% 21 13.6% 13.6% 55 73 82 91 F » De - C- > BE A Anna Maribor 64 p-30 1-20 1-lo u pu+lo pu+20 pu+30 FIGURE 14.37 Grade distribution for a class “graded on a curve"

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