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

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:30, emilyanneK2540

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Answers: 3

continue

Mathematics, 21.06.2019 18:30, budjasdatazaki467

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Answers: 1

continue

Mathematics, 21.06.2019 19:00, ortizprecious5183

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

Answers: 1

continue

Mathematics, 21.06.2019 20:00, anthonybowie99

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Answers: 3

continue

Do you know the correct answer?

A researcher is studying the effect of a stress-reduction program on people's levels of cortisol (a...