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Mathematics, 15.11.2019 18:31, Hellopeople233
Reliance on solid biomass fuel for cooking and heating exposes many children from developing countries to high levels of indoor air pollution. an article presented information on various pulmonary characteristics in samples of children whose households in india used either biomass fuel or liquefied petroleum gas (lpg). for the 756 children in biomass households, the sample mean peak expiratory flow (a person's maximum speed of expiration) was 3.8 l/s, and the sample standard deviation was 1.2. for the 755 children whose households used liquefied petroleum gas, the sample mean pef was 4.37 and the sample standard deviation was 1.19.
(a) calculate a confidence interval at the 95% confidence level for the population mean pef for children in biomass households and then do likewise for children in lpg households. (round your answers to two decimal places.)
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