The Number Of Unhealthy Days Based On The Aqi Air Quality Index For A Random Sam (1)

the number of unhealthy days based on the AQI (air quality index) for a random sample of metropolitan areas is shown ( 23 21 14 40 61 39 1 0 16) round the sample statistics and final answers to one decimal place

construct a 80% confidence interval based on the data. assume the variable is normally distributed

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