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What is the null and alternative hypothesis

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Reference no: EM132483863

In a sample of n=100 adolescents the mean was calculated to be M=43.84. The normal population has a mean of μ = 40 and a standard deviation of σ =12.

Does the sample provide evidence conclude that the sample is significantly different from those of the general population? Use a two-tail test with α = 0.01.

  • What is the null and alternative hypothesis?
  • What is the positive value of zcrit (the cut off for the critical region)? (what is zcrit and how do you find this)
  • What is the σM? (what does this mean and how would you find this)
  • What is the zobt? (what is the zobt and how would you find this?)
  • What is the value of Cohen d? (what is this and how would you find it)
  • What conclusion do you draw?( do we reject the null hypothesis or do we fail to reject the null hypothesis?

Reference no: EM132483863

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