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please help this probability and stat questions, thank you The test score of an English test is normally distributed with a mean of 55 and
please help this probability and stat questions, thank you
The test score of an English test is normally distributed with a mean of 55 and a standard deviation of 10.
a) What is the probability that a randomly selected student will score between 45 and 70. (4 marks)
b) If the bottom 25% student is required to attend remedial class, what is the cut-off score for selecting students to attend the class?(6 marks)
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Numerical Analysis
Authors: Richard L. Burden, J. Douglas Faires
9th edition
538733519, 978-1133169338, 1133169333, 978-0538733519
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