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A teacher gives his class a particular examination on mathematics at the end of each year. The results are

normally distributed with a mean test score of 65 and a standard deviation of 7.

The teacher has told the class that students with a test score in the top 25% will win a special prize. Calculate the test score above which 25% of all test scores lie. Give your answer to 1 decimal place.

Test score = ???

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Here we are given following information mean = 65 standard deviation... View the full answer

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