Are juveniles with lower grades in school more likely to have a court record?  Complete the table below by filling in the percentage of each median grade group who have and do not have a court record.  Also fill in the expected values for each cell.  Then complete the following questions below.                   Juvenile has a court record?     Yes No Total   Median Grade in School A % Expected 4     36     40     B % Expected 27     108     135     C % Expected 113     338     451     D or lower % Expected 26     39     65       Total 170 521 691   Calculate chi-square.  Do this by hand or using Excel and fill your answer in here:   Determine chi-square critical.  You can do this on Excel using the "=chiinv" command.  Use an alpha level of .05.  Fill in the alpha level and degrees of freedom in the parentheses after the chiinv.  Chi-square critical is:   Do you reject the null hypothesis or not?  Write your answer as "reject" or "do not reject".  Calculate Cramer's V using hand calculations or Excel and put your answer here:

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Author:Amos Gilat
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Are juveniles with lower grades in school more likely to have a court record?  Complete the table below by filling in the percentage of each median grade group who have and do not have a court record.  Also fill in the expected values for each cell.  Then complete the following questions below.

 

 

              Juvenile has a court record?

 

 

Yes

No

Total

 

Median Grade in School

A

%

Expected

4

 

 

36

 

 

40

 

 

B

%

Expected

27

 

 

108

 

 

135

 

 

C

%

Expected

113

 

 

338

 

 

451

 

 

D or lower

%

Expected

26

 

 

39

 

 

65

 

 

 

Total

170

521

691

 

Calculate chi-square.  Do this by hand or using Excel and fill your answer in here:  

Determine chi-square critical.  You can do this on Excel using the "=chiinv" command.  Use an alpha level of .05.  Fill in the alpha level and degrees of freedom in the parentheses after the chiinv.  Chi-square critical is:  

Do you reject the null hypothesis or not?  Write your answer as "reject" or "do not reject". 

Calculate Cramer's V using hand calculations or Excel and put your answer here:  

 
 
 
 
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