Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain." The acidity of liquids is measured by pH on a scale of 0 to 14. Distilled water has pH 7.0, and lower pH values indicate acidity. Normal rain is somewhat acidic, so acid rain is sometimes defined as rainfall with a pH below 5.0. A sample of 105 rainwater specimens had mean pH 5.43; standard deviation 0.54; and five-number summary 4.33, 5.05, 5.44, 5.79, 6.81. Macmillan Learning If the distribution is really N(5.43, 0.54), what proportion of observations would be less than 5.05? Give your answer rounded to four decimal places. proportion: If the distribution is really N(5.43, 0.54), what proportion of observations would be less than 5.79? Give your answer rounded to four decimal places. proportion: Do these proportions suggest that the distribution is close to Normal? Why?
Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain." The acidity of liquids is measured by pH on a scale of 0 to 14. Distilled water has pH 7.0, and lower pH values indicate acidity. Normal rain is somewhat acidic, so acid rain is sometimes defined as rainfall with a pH below 5.0. A sample of 105 rainwater specimens had mean pH 5.43; standard deviation 0.54; and five-number summary 4.33, 5.05, 5.44, 5.79, 6.81. Macmillan Learning If the distribution is really N(5.43, 0.54), what proportion of observations would be less than 5.05? Give your answer rounded to four decimal places. proportion: If the distribution is really N(5.43, 0.54), what proportion of observations would be less than 5.79? Give your answer rounded to four decimal places. proportion: Do these proportions suggest that the distribution is close to Normal? Why?
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter4: Exponential And Logarithmic Functions
Section4.CR: Chapter Review
Problem 16CC
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