Mathematics, 27.07.2021 17:00, jennyn26
Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 5.2 parts/million (ppm). A researcher believes that the current ozone level is not at the normal level. The mean of 9 samples is 4.7 ppm with a standard deviation of 1.1. Does the data support the claim at the 0.1 level? Assume the population distribution is approximately normal. Specify if the test is one-tailed or two-tailed.
Answers: 3
Mathematics, 20.06.2019 18:04, anglekhan101
On a coordinate grid, point p is at (4, 3) and point r is at (−2, −5). points q and s are a reflection of both points across the x-axis. what are the coordinates of q and s? q(−4, 3), s(2, −5) q(4, −3), s(−2, 5) q(−4, −3), s(2, 5) q(−4, 3), s(−2, 5) ; -; i can't figure it out, if someone can me with the answer, that would be nice
Answers: 2
Mathematics, 21.06.2019 22:00, ashuntihouston14
If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?
Answers: 3
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