jetthehawk9861

21.04.2020 • 

Mathematics

Measuring lung function: One of the measurements used to determine the health of a person's lungs is the amount of air a person can exhale under force in one second. This is called forced expiratory volume in one second, and is abbreviated FEV1. Assume the mean FEV1 for 10-year-old boys is 2.1 liters and that the population standard deviation is =σ0.5. A random sample of 70 10-year-old boys who live in a community with high levels of ozone pollution are found to have a sample mean FEV1 of 2.03 liters. Can you conclude that the mean FEV1 in the high-pollution community is less than 2.1 liters? Use the =α0.05 level of significance and the P-value method with the TI-84 calculator.

Ответ:

jacorey77

15.10.2022

Mathematics

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First, you need to find what percent of students would vote for Suzy out of the original 200. To do so, divide 25/200. You get 12.5% (or 0.125). Then, multiply that percent by the 1,000 students. You will get 125 students. Hope this helps!

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