Mathematics, 05.03.2021 21:00 Need1ng
A researcher is studying the effect of a stress-reduction program on people's levels of cortisol (a stress hormone). She tests the cortisol levels of 50 people before starting the program, and then tests the participants' cortisol levels again after completing the program. She wants to test the claim that the stress-reduction program reduces cortisol levels.
Which of the following describes the researcher's null and alternative hypotheses?
1. null hypothesis: 1 - 4 = 0; alternative hypothesis: 1-4 <0
2. null hypothesis: 1 - 4 <0; alternative hypothesis: 43-44 > 0
3. null hypothesis: Up = 0; alternative hypothesis: 4p <0
4. null hypothesis: 4p <0; alternative hypothesis: Wp = 0
Answers: 2
Mathematics, 21.06.2019 15:00
The lee family bought their home for $220,000 this year. the equation =220,000(1.038) v = 220 , 000 ( 1 . 038 ) x can be used to find the value, v, of their home after x years. which will be the value of the lee family's home in 5 years?
Answers: 1
Mathematics, 21.06.2019 17:30
Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2
Answers: 3
A researcher is studying the effect of a stress-reduction program on people's levels of cortisol (a...
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