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c): Speed (in km/hour) for light and heavy vehicles Heavy L 8 Light Vehicles 112 95 8: 79 6.

c): Speed (in km/hour) for light and heavy vehicles Heavy L 8 Light Vehicles 112 95 8: 79 6.

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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Table 1(c): Speed (in km/hour) for light and heavy vehicles on a highway segment Light Vehicles Heavy Vehicles 112 80 95 85 79 62 65 76 108 87 98 74 71 108 65 82 127 94
Transcribed Image Text:Table 1(c): Speed (in km/hour) for light and heavy vehicles on a highway segment Light Vehicles Heavy Vehicles 112 80 95 85 79 62 65 76 108 87 98 74 71 108 65 82 127 94
1 (a) The amount of carbon monoxide in the daily emissions to outdoor has a normal distribution with a mean of 90 and a standard deviation of 20. For a random sample of 40 days, find the probability that the average amount of carbon monoxide emissions will exceed 80. (b) A researcher studied the tensile yield strength of steel. She performed tests on 20 steel samples and obtained a mean (X) of 305 MPa with a standard deviation (s) of 16 MPa. Based on her research, she claimed that the tensile yield strength of steel generally exceeds 300 MPa. Construct a 95% confidence interval for the population mean, assuming that the population is normally distribute (c) A traffic safety researcher obtained speed data of light and heavy vehicles travelling on a highway segment (refer Table (.1(c). He hypothesised that light vehicles travel at higher speeds than heavy vehicles. At the 0.05 significance level, can we conclude that light vehicles travel at higher speeds than heavy vehicles?
Transcribed Image Text:1 (a) The amount of carbon monoxide in the daily emissions to outdoor has a normal distribution with a mean of 90 and a standard deviation of 20. For a random sample of 40 days, find the probability that the average amount of carbon monoxide emissions will exceed 80. (b) A researcher studied the tensile yield strength of steel. She performed tests on 20 steel samples and obtained a mean (X) of 305 MPa with a standard deviation (s) of 16 MPa. Based on her research, she claimed that the tensile yield strength of steel generally exceeds 300 MPa. Construct a 95% confidence interval for the population mean, assuming that the population is normally distribute (c) A traffic safety researcher obtained speed data of light and heavy vehicles travelling on a highway segment (refer Table (.1(c). He hypothesised that light vehicles travel at higher speeds than heavy vehicles. At the 0.05 significance level, can we conclude that light vehicles travel at higher speeds than heavy vehicles?
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