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Author Question: A study examining the effects of white noise on concentration used two groups. The first group was ... (Read 91 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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Reply 2 on: Jun 20, 2018
Wow, this really help

diana chang

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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