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, that would be inhaled while traveling on the bus during its usual 1818‑mile trip on congested freeways from South Central LA to a magnet school in West LA. (As a reference, the average intake of motor emissions of carbon monoxide in the LA area is estimated to be about 0.0000460.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given. 1.151.15 0.330.33 0.400.40 0.330.33 1.351.35 0.380.38 0.250.25 0.400.40 0.350.35 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 two 90%90% confidence intervals, one with all the data and one 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. Use Table C or the software of your choice for these calculations. (Enter your answers rounded to three decimal places.) a) Lower bound(all data) = b) Upper bound (all data) = c) Lower bound (outliers removed) = d) 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, that would be inhaled while traveling on the bus during its usual 1818‑mile trip on congested freeways from South Central LA to a magnet school in West LA. (As a reference, the average intake of motor emissions of carbon monoxide in the LA area is estimated to be about 0.0000460.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given.
| 1.151.15 | 0.330.33 | 0.400.40 | 0.330.33 | 1.351.35 | 0.380.38 | 0.250.25 | 0.400.40 | 0.350.35 |
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 two 90%90% confidence intervals, one with all the data and one 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. Use Table C or the software of your choice for these calculations. (Enter your answers rounded to three decimal places.)
a) Lower bound(all data) =
b) Upper bound (all data) =
c) Lower bound (outliers removed) =
d) Upper bound (outliers removed) =
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
