A researcher is investigating cross-cultural differences in the perception of psychotherapy.  A sample of single young adults from Germany (n=30) and a sample single young adults from Japan (n=24) were administered a survey on the value of psychotherapy for mental health.  To determine if the results from the German sample (M=69, SD=9.7) are significantly different from those of the Japan sample (M=62, SD=8.2), find the following, using a=.05:

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A researcher is investigating cross-cultural differences in the perception of psychotherapy.  A sample of single young adults from Germany (n=30) and a sample single young adults from Japan (n=24) were administered a survey on the value of psychotherapy for mental health.  To determine if the results from the German sample (M=69, SD=9.7) are significantly different from those of the Japan sample (M=62, SD=8.2), find the following, using a=.05:

 

1.  HO:
2.  H1:
3.  df =
4.  tcrit =
5.  SS1 =
6.  SS2 =
7.  s2p =
8.  sM1-M2 =
9.  M1–M2 =
10.  tobt =
11.  Decision regarding HO:
12.  Interpretation in APA format:
13.  r2 =

 

 

 

 

 

The distracting effect of talking on the cell phone while driving has been well-documented.  However, some evidence suggests that practicing multi-tasking can improve performance.  A group of drivers (n=22) were measured on the number of driving mistakes made on a driving game while talking on a cell phone before and after practice.  The average improvement after practice was 3.4 points (SD=2.7).  Find the following, using a=.05:

 

14.  HO:
15.  H1:
16.  df =
17.  tcrit =
18.  sMD =
19.  tobt =
20.  Decision regarding HO:
21.  Interpretation in APA format:
22.  d =