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Author Question: A study examining the effects of white noise on concentration used two groups. The first group was ... (Read 63 times)

P68T

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on: Jun 20, 2018
A study examining the effects of white noise on concentration used two groups. The first group
  was exposed to 80 decibels of white noise for 30 minutes. The second group wore
  noise-canceling headphones also for 30 minutes.
 
  The group wearing the headphones is called
  the
  A) alternative group B) control group
  C) experimental group D) null group

Question 2

Which of the following represents the null hypothesis for a two-group experiment?
 
  A) M1 - M2 = 1 B) M1 M2
  C) M1 - M2 = X1 - X2 D) M1 = M2


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katara

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Reply #1 on: Jun 20, 2018
Answer to Question 1

C

Answer to Question 2

D


P68T

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  • Posts: 509
Reply 2 on: Jun 20, 2018
Great answer, keep it coming :)

emsimon14

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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