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Mathematics, 05.05.2020 19:36 jilliandantuma84
Assume that the helium porosity (in percentage) of coal samples taken from any particular seam is normally distributed with true standard deviation .75. a. Compute a 95% CI for the true average porosity of a certain seam if the average porosity for 20 specimens from the seam was 4.85. b. Compute a 98% CI for true average porosity of another seam based on 16 specimens with a sample average porosity of 4.56.
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Assume that the helium porosity (in percentage) of coal samples taken from any particular seam is no...
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