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.)
Answers: 3
Mathematics, 21.06.2019 19:10
Which graph represents the function g(x) = |x + 4| + 2?
Answers: 1
Mathematics, 21.06.2019 20:30
Answer asap evaluate 4-0.25g+0.5h4β0.25g+0.5h when g=10g=10 and h=5h=5.
Answers: 3
Mathematics, 21.06.2019 21:30
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Reliance on solid biomass fuel for cooking and heating exposes many children from developing countri...
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