Question 1202077
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Eden obtains a mark of 67 on her final year exam. Assuming the reliability of the exam is 0.66 
and the standard deviation is 10. What is the 95% confidence interval of her mark? What does the interval imply?



If Eden completes a new exam consisting of 8 folds of the original exam, what is the reliability of the new exam? 
What is the 95% confidence interval of her mark based on the new reliability


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What all these words mean in your post ?