Mathematics, 17.12.2019 03:31 dondre54
An inventor has developed a new, energy-efficient lawn mower engine. he claims that the engine will run continuously for 5 hours (300 minutes) on a single gallon of regular gasoline. suppose simple random samples of 500 engines were tested. the engines run for an average of 295 minutes, with a standard deviation of 20 minutes. test the claim that the run time differs from 300 minutes. use a 0.05 level of significance a) set up test hypothesis b) write test statistics and sketch c) apply classical or p-value method d) draw conclusion and interpret.
Answers: 1
Mathematics, 21.06.2019 19:30
The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)
Answers: 3
Mathematics, 21.06.2019 20:00
Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'
Answers: 1
Mathematics, 21.06.2019 20:00
One hectometer is a) 1/1000 of a meter. b) 1/100 of a meter. c) 10 meters. d) 100 meters. e) 1000 meters.
Answers: 1
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