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A researcher wants to examine if practicing yoga reduces stress. She selected a sample of n...

A researcher wants to examine if practicing yoga reduces stress. She selected a sample of n = 30 participants and assessed a stress level of each participant before and after taking a yoga class. The results of the study are tested with a repeated-measures t-test p <.05, 1-tail. What is the alternative hypothesis for this test?

  • A. There is no significant change in stress level after taking yoga class.

  • B. There is a significant significant change in stress level after taking yoga class.

  • C. There is no significant reduction of stress level after taking yoga class.

  • D. There is a significant reduction of stress level after taking yoga class.

Math   Statistics-And-Probability   
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Answer #1

Answer:-

From the above information

A researcher wants to examine if practicing yoga reduces stress. For this she selected a sample of n = 30 participant's and assessed a stress level of.each participant before and after taking a yoga class.This is dependent t test . Here p < 0.05 ( one tailed test) where the 0.05 is the level of significance and p called P-value. So in this case alternative hypothesis is

Ho :- There is no significant reduction of stress level after taking yoga class.

H1:-There is significant reduction of stress level after taking yoga class.

Therefore option D is correct.

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