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An article described an investigation into the coating weights for large pipes resulting from a galvanized coating process. Production standards call for a true average
An article described an investigation into the coating weights for large pipes resulting from a galvanized coating process. Production standards call for a true average weight of 200 lb per pipe. The accompanying descriptive summary and boxplot are from Minitab.
Variable | N | Mean | Median | TrMean | StDev | SEMean |
ctg wt | 30 | 206.22 | 206.00 | 206.81 | 6.35 | 1.16 |
Variable | Min | Max | Q1 | Q3 |
ctg wt | 193.00 | 218.00 | 202.75 | 212.00 |
Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.) t = _______
P-value = ________
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