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2. A simple of 900 students has mean 3.5 cms and standard deviation 2.61 cms is the sample from a large population of mean 3.25
2. A simple of 900 students has mean 3.5 cms and standard deviation 2.61 cms is the sample from a large population of mean 3.25 cms and standard deviation 2.61 cms? Check at 99% level of confidence. Also find the range.(12 marks)
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