11. Ed had a mark of 75 out of 80 on a test, which had a mean mark of 60 and a standard deviat Sam had a mark of 78 out of 90 on a test, which had a mean mark of 66 and a standard devi Statistically, who had the better mark compared to the rest of his class? A Ed had a better mark. B Sam had a better mark C You cannot tell who did better with the given information. D The two scores are statistically the same. 12. Anil received the following marks on his first five biology tests: 75, 84, 92, 61, and 79. W must Anil earn on his sixth test so that his mean mark for all six tests will be 80? 75+84 +92 +61 +79
11. Ed had a mark of 75 out of 80 on a test, which had a mean mark of 60 and a standard deviat Sam had a mark of 78 out of 90 on a test, which had a mean mark of 66 and a standard devi Statistically, who had the better mark compared to the rest of his class? A Ed had a better mark. B Sam had a better mark C You cannot tell who did better with the given information. D The two scores are statistically the same. 12. Anil received the following marks on his first five biology tests: 75, 84, 92, 61, and 79. W must Anil earn on his sixth test so that his mean mark for all six tests will be 80? 75+84 +92 +61 +79
A First Course in Probability (10th Edition)
10th Edition
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Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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![11. Ed had a mark of 75 out of 80 on a test, which had a mean mark of 60 and a standard deviation of 7.5.
Sam had a mark of 78 out of 90 on a test, which had a mean mark of 66 and a standard deviation of 6.0.
Statistically, who had the better mark compared to the rest of his class?
A
Ed had a better mark.
B
Sam had a better mark
C
You cannot tell who did better with the given information.
D
The two scores are statistically the same.
12. Anil received the following marks on his first five biology tests: 75, 84, 92, 61, and 79. What test score
must Anil earn on his sixth test so that his mean mark for all six tests will be 80?
75+84 +92 +61 +79](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe8c77d0d-7cca-49a2-9b59-622840a914d7%2Fdd0ed485-aa76-4efe-8b90-ea4da956874d%2Fgkwm7h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:11. Ed had a mark of 75 out of 80 on a test, which had a mean mark of 60 and a standard deviation of 7.5.
Sam had a mark of 78 out of 90 on a test, which had a mean mark of 66 and a standard deviation of 6.0.
Statistically, who had the better mark compared to the rest of his class?
A
Ed had a better mark.
B
Sam had a better mark
C
You cannot tell who did better with the given information.
D
The two scores are statistically the same.
12. Anil received the following marks on his first five biology tests: 75, 84, 92, 61, and 79. What test score
must Anil earn on his sixth test so that his mean mark for all six tests will be 80?
75+84 +92 +61 +79
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