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In the 1st year, a student obtained 90, 95, 80, 70, 85, 85, 80 arxl 80 marks in eight subjects. In the 2nd year, he obtained an average of 8D marks for eight subjects. Verify it statistically whether any significant improvement occurred in his performance and also find the Z-score for 30, 90 and 70. Hint: If the mean values are 3 standard deviation away from each other, then it is considered significant.

In the 1st year, a student obtained 90, 95, 80, 70, 85, 85, 80 arxl 80 marks in eight subjects. In the 2nd year, he obtained an average of 8D marks for eight subjects. Verify it statistically whether any significant improvement occurred in his performance and also find the Z-score for 30, 90 and 70. Hint: If the mean values are 3 standard deviation away from each other, then it is considered significant.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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In the 1st year, a student obtained 90, 95, 80, 70, 85, 85, 80 and 80 maiks in eight subjects. In the 2nd year, he obtained an average of 8D marks for eight subjects. Verify it statistically whether any significant improvement occured in his performance and also find the Z-score for 30, 90 and 70. Hint: If the mean values are 3 standard deviation away from each other, then it is considered significant. End of Do
Transcribed Image Text:In the 1st year, a student obtained 90, 95, 80, 70, 85, 85, 80 and 80 maiks in eight subjects. In the 2nd year, he obtained an average of 8D marks for eight subjects. Verify it statistically whether any significant improvement occured in his performance and also find the Z-score for 30, 90 and 70. Hint: If the mean values are 3 standard deviation away from each other, then it is considered significant. End of Do
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