Exercise 5.1 On the final examination in English, the mean was 72 and the standard deviation was 15. a. Determine the standard scores (z-values) of students receiving the grade of 65. b. Determine the standard scores (z-values) of students receiving the grade of 85. c. Determine the probability that a student will score greater than 75. d. Determine the probability that a student will score lower than 65.

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Chapter1: Combinatorial Analysis
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Exercise 5.1 On the final examination in English, the mean was
72 and the standard deviation was 15.
a. Determine the standard scores (z-values) of students
receiving the grade of 65.
b. Determine the standard scores (z-values) of students
receiving the grade of 85.
c. Determine the probability that a student will score greater
than 75.
d. Determine the probability that a student will score lower
than 65.
e. Find the grade corresponding to standard score of -0.50.
f. Find the grade corresponding to standard score of 1.
Transcribed Image Text:Exercise 5.1 On the final examination in English, the mean was 72 and the standard deviation was 15. a. Determine the standard scores (z-values) of students receiving the grade of 65. b. Determine the standard scores (z-values) of students receiving the grade of 85. c. Determine the probability that a student will score greater than 75. d. Determine the probability that a student will score lower than 65. e. Find the grade corresponding to standard score of -0.50. f. Find the grade corresponding to standard score of 1.
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