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2. A simple of 900 students has mean 3.5 cms and standard deviation 2.61 cms is...

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.

Math   Statistics-And-Probability   
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next , range = 3.724-3.276

= 0.448

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