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Ten typist who applied for a position in the typing pool of a large office typed...

Ten typist who applied for a position in the typing pool of a large office typed a test paragraph in 75, 70, 59, 60, 63, 55, 52, 70, 45 and 85 seconds.
What is the computed mean value?
What is the tabular value in solving the confidence interval of the data at 95% confidence level?
What is the degrees of freedom?

Math   Statistics-And-Probability   
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