Question
QUESTION Table 1 shows the carbon monoxide (CO) measurements in Shah Alam air during 9am and 5pm for a randomly selected 10 days. Measurement are
QUESTION
Table 1 shows the carbon monoxide (CO) measurements in Shah Alam air during 9am and 5pm for a randomly selected 10 days. Measurement are parts per million. The objective of the study is to see whether the CO concentrations at 9am is different from 5pm.DAYDAY DAY 9am 5pm
1 1.6 06
2 2.7 2.3
3 0.9 0.6
4 0.5 0.3
5 0.2 0.3
6 0.4 1.0
7 2.8 2.8
8 6.1 4.3
9 2.0 2.6
10 1.1 1.2
a)Calculate the mean and standard deviation of CO concentrations for both hours.
b)Assuming population variances are equal conduct an appropriate test to test whether there is a significant different of CO concentrations between 9am and 5pm at a = 0.05.
c)Based on your answers in (a) and (b) summarize the different levels of CO concentrations between the two hours.
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