\[ [6,14] \] B10. (a) An engineer is interested in the level of carbon dioxide as a waste product from a certain production process. She supposes that the level of carbon dioxide is higher that \( 4.9 \times 10^{-6} \) units. Does a sample of 25 readings with mean \( \bar{x}=5.1 \times 10^{-6} \) units and \( s=2.1 \times 10^{-6} \) present sufficient evidence to sustain the statement? Use the level of significance of \( \alpha=0.05 \).
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- Null hypothesis (H0): The mean level of carbon dioxide is \( \mu = 4.9 \times 10^{-6} \) units. - Alternative hypothesis (H1): The mean level of carbon dioxide is \( \mu > 4.9 \times 10^{-6} \) units. Show more…
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