Mathematics, 02.05.2021 05:00, bammbamm538
You have been given the task of designing a study concerning the lifetimes of five different types of electric motor. The initial question to be addressed is whether there are differences in mean lifetime among the five types. There are 20 motors, four of each type, available for testing. A maximum of five motors can be tested in a day. The ambient temperature differs from day to day, and this can affect motor lifetime.
a. Describe how you would choose the five motors to test each day. Would you use a completely randomized design? Would you use any randomization at all?
b. If X;j represents the measured lifetime of a motor of type i tested on day j, express the test statistic for testing the null hypothesis of equal lifetimes in terms of the Xir
Answers: 1
Mathematics, 20.06.2019 18:04, anglekhan101
On a coordinate grid, point p is at (4, 3) and point r is at (β2, β5). points q and s are a reflection of both points across the x-axis. what are the coordinates of q and s? q(β4, 3), s(2, β5) q(4, β3), s(β2, 5) q(β4, β3), s(2, 5) q(β4, 3), s(β2, 5) ; -; i can't figure it out, if someone can me with the answer, that would be nice
Answers: 2
Mathematics, 21.06.2019 14:20, priscillavaladez1112
Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.
Answers: 1
Mathematics, 21.06.2019 22:40, zmzmzmzmz2975
If f(x) = 3x2 - 2x+4 and g(x) = 5x + 6x - 8, find (f-g)(x).
Answers: 1
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