In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person per million grams emitted, that would be inhaled while traveling on the bus during its usual 18-mile18-mile trip on congested freeways from South Central LA to a magnet school in West LA. (In comparison, a city of 11 million people will inhale a total of about 1212 grams of exhaust per million grams emitted.) The amounts for the nine buses when driven with the windows open are given in the table. 1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35 A good way to judge the effect of outliers is to do your analysis twice, once with the outliers and a second time without them. Give the 90%90% confidence interval with all the data for the mean pollution intake among all school buses used in the Southern California Air Basin that travel the route investigated in the study. Give your answers to three decimal places. What is lower bound upper bound Give the 90%90% confidence interval with the outliers removed for the mean pollution intake among all school buses used in the Southern California Air Basin that travel the route investigated in the study. Note that the outliers are 1.15 and 1.35.. Give your answers to three decimal places. lower bound outliers removed: upper bound outliers removed:
In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person per million grams emitted, that would be inhaled while traveling on the bus during its usual 18-mile18-mile trip on congested freeways from South Central LA to a magnet school in West LA. (In comparison, a city of 11 million people will inhale a total of about 1212 grams of exhaust per million grams emitted.) The amounts for the nine buses when driven with the windows open are given in the table.
| 1.15 | 0.33 | 0.40 | 0.33 | 1.35 | 0.38 | 0.25 | 0.40 | 0.35 |
A good way to judge the effect of outliers is to do your analysis twice, once with the outliers and a second time without them. Give the 90%90% confidence interval with all the data for the mean pollution intake among all school buses used in the Southern California Air Basin that travel the route investigated in the study. Give your answers to three decimal places. What is
Give the 90%90% confidence interval with the outliers removed for the mean pollution intake among all school buses used in the Southern California Air Basin that travel the route investigated in the study. Note that the outliers are 1.15 and 1.35.. Give your answers to three decimal places.
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