Mean pollution index, Based on information from the Rocky Mountain News, a random sample, Basic Statistics

Mean pollution index

Based on information from the Rocky Mountain News, a random sample of 12 winter days in Denver gave a mean pollution index of 43 with a standard deviation of 21. For Englewood (a suburb of Denver), a random sample of 14 winter days gave a mean pollution index of 36 with a standard deviation of 15. Find a 95% confidence interval for 1-2.

A. (29.657,56.343)

B. (27.339,44.661)

C. (2.318,11.682)

D. (-8.182,22.182)

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Basic Statistics: Mean pollution index

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Basic Statistics: Mean pollution index

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Recent Questions Asked Basic Statistics

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Basic Statistics: Mean pollution index

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Recent Questions Asked Basic Statistics

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