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A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 79 and a standard deviation of 7. Complete parts (a) through (d). ..... a. What is the probability that a student scored below 91 this exam? The probability that a student scored below 91 is 0.9564 (Round to four decimal places as needed.) b. What is the probability that a student scored between 72 and 99? The probability that a student scored between 72 and 99 is 0.8392 (Round to four decimal places as needed.) c. The probability is 25% that a student taking the test scores higher than what grade? The probability is 25% that a student taking the test scores higher than 84 (Round to the nearest integer as needed.) ion 1 Ist d. If the professor grades on a curve (for example, the professor could give A's to the top 10% of the class, regardless of the score), is a student better off with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 or a grade of 70 on a different exam, where the mean is 66 and the standard deviation is 47 Show your answer statistically and explain. tion S stion 9 and the Z with a grade of 93 on the exam with mean of 79 and a standard deviation of 7 because the Z value for the grade of 93 is A student is value for the grade of 70 on the different exam is (Round to two decimal places as needed.)

A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 79 and a standard deviation of 7. Complete parts (a) through (d). ..... a. What is the probability that a student scored below 91 this exam? The probability that a student scored below 91 is 0.9564 (Round to four decimal places as needed.) b. What is the probability that a student scored between 72 and 99? The probability that a student scored between 72 and 99 is 0.8392 (Round to four decimal places as needed.) c. The probability is 25% that a student taking the test scores higher than what grade? The probability is 25% that a student taking the test scores higher than 84 (Round to the nearest integer as needed.) ion 1 Ist d. If the professor grades on a curve (for example, the professor could give A's to the top 10% of the class, regardless of the score), is a student better off with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 or a grade of 70 on a different exam, where the mean is 66 and the standard deviation is 47 Show your answer statistically and explain. tion S stion 9 and the Z with a grade of 93 on the exam with mean of 79 and a standard deviation of 7 because the Z value for the grade of 93 is A student is value for the grade of 70 on the different exam is (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 79 and a standard deviation of 7. Complete parts (a) through (d). a. What is the probability that a student scored below 91 on this exam? The probability that a student scored below 91 is 0.9564 (Round to four decimal places as needed.) b. What is the probability that a student scored between 72 and 99? The probability that a student scored between 72 and 99 is 0.8392 (Round to four decimal places as needed.) Eisi c. The probability is 25% that a student taking the test scores higher than what grade? The probability is 25% that a student taking the test scores higher than 84 (Round to the nearest integer as needed.) Etion stion 4 stion 8 d. If the professor grades on a curve (for example, the professor could give A's to the top 10% of the class, regardless of the score), is a student better off with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 or a grade of 70 on a different exam, where the mean is 66 and the standard deviation is 4? Show your answer statistically and explain. Estion 5 Eestion A student is with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 because the Z value for the grade of 93 is and the Z value for the grade of 70 on the different exam is (Round to two decimal places as needed.)
Transcribed Image Text:A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 79 and a standard deviation of 7. Complete parts (a) through (d). a. What is the probability that a student scored below 91 on this exam? The probability that a student scored below 91 is 0.9564 (Round to four decimal places as needed.) b. What is the probability that a student scored between 72 and 99? The probability that a student scored between 72 and 99 is 0.8392 (Round to four decimal places as needed.) Eisi c. The probability is 25% that a student taking the test scores higher than what grade? The probability is 25% that a student taking the test scores higher than 84 (Round to the nearest integer as needed.) Etion stion 4 stion 8 d. If the professor grades on a curve (for example, the professor could give A's to the top 10% of the class, regardless of the score), is a student better off with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 or a grade of 70 on a different exam, where the mean is 66 and the standard deviation is 4? Show your answer statistically and explain. Estion 5 Eestion A student is with a grade of 93 on the exam with a mean of 79 and a standard deviation of 7 because the Z value for the grade of 93 is and the Z value for the grade of 70 on the different exam is (Round to two decimal places as needed.)
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