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(b) A good way to judge the effect of outliers is to do your analysis twice, once With the sutilers and them. Give two 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.) Jower bound all data = upper bound %3D all data lower bound outliers removed %3D upper bound outliers removed

(b) A good way to judge the effect of outliers is to do your analysis twice, once With the sutilers and them. Give two 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.) Jower bound all data = upper bound %3D all data lower bound outliers removed %3D upper bound outliers removed

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The data is listed in the first photo. Find the bounds. 

Attempt 4 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 18-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 0.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given. 1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35 To access the complete data set, click the link for your preferred software format: Excel Minitab14-18 Minitab18+ JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt! (a) Make a stemplot. Are there outliers or strong skewness that would forbid use of the t procedures? The stemplot does not indicate the presence of outliers. The sample is small and the stemplot is skewed, so the use of t procedures is not appropriate. The stemplot suggests the presence of outliers. The sample is small but the stemplot is not skewed., so the use of t O The stemplot suggests the presence of outliers. The sample is small and the stemplot is skewed, so the use of 1 procedures is not appropriate. The stemplot does not indicate the presence of outliers. The sample is small but the stemplot is not skewed, so the use procedures is appropriate. of t procedures is appropriate. Fublishen WH. Freeman Question Source: Moore, The Basic Practice Of Statistics, Se
Transcribed Image Text:Attempt 4 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 18-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 0.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given. 1.15 0.33 0.40 0.33 1.35 0.38 0.25 0.40 0.35 To access the complete data set, click the link for your preferred software format: Excel Minitab14-18 Minitab18+ JMP SPSS TI R Mac-TXT PC-TXT CSV Crunchlt! (a) Make a stemplot. Are there outliers or strong skewness that would forbid use of the t procedures? The stemplot does not indicate the presence of outliers. The sample is small and the stemplot is skewed, so the use of t procedures is not appropriate. The stemplot suggests the presence of outliers. The sample is small but the stemplot is not skewed., so the use of t O The stemplot suggests the presence of outliers. The sample is small and the stemplot is skewed, so the use of 1 procedures is not appropriate. The stemplot does not indicate the presence of outliers. The sample is small but the stemplot is not skewed, so the use procedures is appropriate. of t procedures is appropriate. Fublishen WH. Freeman Question Source: Moore, The Basic Practice Of Statistics, Se
(b) 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% 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.) lower bound all data upper bound all data lower bound outliers removed upper bound outliers removed (c) Compare the two intervals in part (b). What is the most important effect of removing the outliers? Question Source: Moore, The Basic Practice Of Statistics, 8e Publisher: W.H. Freeman prt sc delete insert 144 home
Transcribed Image Text:(b) 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% 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.) lower bound all data upper bound all data lower bound outliers removed upper bound outliers removed (c) Compare the two intervals in part (b). What is the most important effect of removing the outliers? Question Source: Moore, The Basic Practice Of Statistics, 8e Publisher: W.H. Freeman prt sc delete insert 144 home
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