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Reliance on solid biomass fuel for cooking and heating exposes many children from developing countries to high levels of indoor air pollution. The article “Domestic Fuels, Indoor Air Pollution, and Children’s Health” (Annals of the N.Y. Academy of Sciences, 2008: 209–217) presented information on various pulmonary characteristics in samples of children whose households in India used either biomass fuel or liquefied petroleum gas (LPG). For 75 children in biomass households, the sample mean peak expiratory flow (a person’s maximum speed of expiration) was 3.30 L/s, and the sample standard deviation was 1.20. For the 78 children whose households used liquefied petroleum gas, the sample mean PEF was 4.25 and the sample standard deviation was 1.75.  Estimate the difference in PEF between children living in households using biomass fuel and liquified petroleum gas using a 90% confidence level.  Do we have reason to believe that children who live in households that use biomass fuel have lower PEF than children from LPG households?

The normal microbiota in the human body help the pathogens to flourish through symbiosis

The leukocyte that is involved in inflamation:   A. Mast cell B. Natural killer cell C. Monocyte D. Neutrophil  

Science and technology are the same thing

How did the emergence of mechanical clocks affect the relationship between time and work?

What does the carving feature in the Autopsy tool help with?

Explain what you understand from the following Wireshark traffic  

A 35

Two 6.8×6.8 cm metal plates are separated by a 0.67 mm thick dielectric material with a dielectric constant of 9.0. What is the capacitance?

What is the internal resistance of a 3.5 V battery that produces power of 50 W when shorted with wire of negligble resistance?