Question

In four tests taken by 450 students, marks are found to be normally distributed with mean and variance as given below: test no. meanvariance 74 75 78 82 121 100 196 169 a has secured 80 in the first test, 81 in the second, 86 in the third and 89 in the fourth. in which test did a actually perform best relative to other students? (a) fourth test (b) third test (c) second test(d) first test [jnu

Answer 1

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