Question 1 Psychology researchers have demonstrated that memory is usually improved by studying material on multiple occasions rather than one time only (distributed practice effects). A recent study examining this effect studied two different delay intervals. Group 1 had a one-day interval between study sessions and group two had a one-week gap between study sessions. Results for each study condition are presented below: One-Day Gap n= 20 M = 26.4 SS = 395 One-Week Gap n = 20 M = 29.6 SS = 460. Do the data indicate a significant difference between the two study conditions? Evaluate this hypothesis at the .05 significance level. (State your hypotheses, state the critical t-value, calculate the t-value for the sample mean difference and state your conclusion about the null hypothesis). Show all

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Do the data indicate a significant difference between the two study conditions? 
Evaluate this hypothesis at the 0.5 significance level. (State your hypothesis, state the critical t-value, calculate the t-value for the sample mean difference and state your conclusion about the null hypothesis) show all calculations 

**Question 1**

Psychology researchers have demonstrated that memory is usually improved by studying material on multiple occasions rather than one time only (distributed practice effects). A recent study examining this effect studied two different delay intervals. Group 1 had a one-day interval between study sessions and group two had a one-week gap between study sessions. Results for each study condition are presented below:

**One-Day Gap**  
n = 20  
M = 26.4  
SS = 395  

**One-Week Gap**  
n = 20  
M = 29.6  
SS = 460  

Do the data indicate a significant difference between the two study conditions? Evaluate this hypothesis at the .05 significance level. (State your hypotheses, state the critical t-value, calculate the t-value for the sample mean difference and state your conclusion about the null hypothesis). Show all calculations.
Transcribed Image Text:**Question 1** Psychology researchers have demonstrated that memory is usually improved by studying material on multiple occasions rather than one time only (distributed practice effects). A recent study examining this effect studied two different delay intervals. Group 1 had a one-day interval between study sessions and group two had a one-week gap between study sessions. Results for each study condition are presented below: **One-Day Gap** n = 20 M = 26.4 SS = 395 **One-Week Gap** n = 20 M = 29.6 SS = 460 Do the data indicate a significant difference between the two study conditions? Evaluate this hypothesis at the .05 significance level. (State your hypotheses, state the critical t-value, calculate the t-value for the sample mean difference and state your conclusion about the null hypothesis). Show all calculations.
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