Does the sulphur content of the fuel samples follow a normal distribution with a mean of 230 ppm and a standard deviation of 53 ppm? P-value number (rtol=0.01, atol=0.0001) What is your conclusion at a 1% significance level? ? O (a) The test is inconclusive O (b) The sulphur content of gas follows the stated distribution

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#563. Fuel Sulphur
A quality control engineer at Shell visits 85 gas stations and collects a fuel sample from each. She measures the
sulphur content in the gas and sorts the samples into 4 different batches. She finds: 19 samples with less than
180 ppm sulphur, 23 samples between 180 and 230 ppm, 23 samples between 230 and 280 ppm, and 20
samples with more than 280 ppm.
Does the sulphur content of the fuel samples follow a normal distribution with a mean of 230 ppm and a
standard deviation of 53 ppm?
P-value number (rtol=0.01, atol=0.0001)
What is your conclusion at a 1% significance level? ?
O (a) The test is inconclusive
O (b) The sulphur content of gas follows the stated distribution
Transcribed Image Text:#563. Fuel Sulphur A quality control engineer at Shell visits 85 gas stations and collects a fuel sample from each. She measures the sulphur content in the gas and sorts the samples into 4 different batches. She finds: 19 samples with less than 180 ppm sulphur, 23 samples between 180 and 230 ppm, 23 samples between 230 and 280 ppm, and 20 samples with more than 280 ppm. Does the sulphur content of the fuel samples follow a normal distribution with a mean of 230 ppm and a standard deviation of 53 ppm? P-value number (rtol=0.01, atol=0.0001) What is your conclusion at a 1% significance level? ? O (a) The test is inconclusive O (b) The sulphur content of gas follows the stated distribution
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