When people learn a new task, their performance usually improves when they are tested the next day, but only if they get 6 hours sleep (Sticckgold, et al., 2000). The following data demonstrate this phenomenon.  The participants learned a visual discrimination task on one day.  Half of the participants were allowed to have at least 6 hours of sleep and the other half were kept awake all night.                                         6 hours sleep                                   No sleep                                            n =14                                                  n = 14                                           M = 72                                                M =65                                           SS = 932                                            SS = 706 Will the 6-hour sleep show a much higher performance rate? This time use a one-tail with alpha = .05    Show all of the steps. Remember use the attached t-distribution chart when  obtaining your critical region.     Problem solving template  n =  df1 + df2  M1=  M2=  μ1-μ2 = 0  SS1 + SS2=  s2p =  S(M1-M2) =  State the hypothesis s and select alpha (consider one tailed or two tailed) Sate hypothesis in words:  Null stated in words:  Alternative stated in words:  State hypothesis in symbols: Hₒ:   State alternative in symbols: Hₗ:  Locate critical region for stated alpha  Compute test statistic (Independent t-score)  Pooled variance S2p:  Estimated standard error S(M1-M2) :  Computed Independent t statistic:  Make a decision about the null hypothesis and state a conclusion.  Decision: Are you going to reject the null or fail to reject the null Conclusion: ex. The independent variable did or did not have a significant effect Remember:

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When people learn a new task, their performance usually improves when they are tested the next day, but only if they get 6 hours sleep (Sticckgold, et al., 2000). The following data demonstrate this phenomenon.  The participants learned a visual discrimination task on one day.  Half of the participants were allowed to have at least 6 hours of sleep and the other half were kept awake all night.  

                                      6 hours sleep                                   No sleep

                                           n =14                                                  n = 14

                                          M = 72                                                M =65

                                          SS = 932                                            SS = 706

Will the 6-hour sleep show a much higher performance rate? This time use a one-tail with alpha = .05    Show all of the steps.

Remember use the attached t-distribution chart when  obtaining your critical region.

 

 

Problem solving template 

n = 

df1 + df2 

M1= 

M2= 

μ1-μ2 = 0 

SS1 + SS2= 

s2p = 

S(M1-M2) = 

  1. State the hypothesis s and select alpha (consider one tailed or two tailed) Sate hypothesis in words: 

Null stated in words: 

Alternative stated in words: 

State hypothesis in symbols: Hₒ:  

State alternative in symbols: Hₗ: 

  1. Locate critical region for stated alpha 
  2. Compute test statistic (Independent t-score) 

Pooled variance S2p: 

Estimated standard error S(M1-M2) : 

Computed Independent t statistic: 

  1. Make a decision about the null hypothesis and state a conclusion. 

Decision: Are you going to reject the null or fail to reject the null Conclusion: ex. The independent variable did or did not have a significant effect Remember:

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