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The average low temperature for Doha in November is claimed to be 20oF. The low temperatures...

The average low temperature for Doha in November is claimed to be 20oF. The low temperatures of 12 randomly selected days in November are measured. The sample average is calculated to be 18oF with a standard deviation of 2 oF.

  1. Test the claim at 1% significance level.
  2. Calculate the 99% confidence interval
Math   Statistics-And-Probability   
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