Yes, it is significant evidence of a difference between the age distribution of jurors and the countrywide age distribution.
No, there is no age bias in the selection of jurors.
P       Oi    Ei     ( Oi-Ei) ^2/Ei
0.421 Â Â 399 Â Â 421 Â Â 1.149643705
0.229 Â Â 231 Â Â 229 Â Â 0.017467249
0.157 Â Â 158 Â Â 157 Â Â 0.006369427
0.193 Â Â 193 Â Â 193 Â Â 1.870466321
 1     1000  1000   3.043946702
The above can be represented in graphs.
Now,
Ei = n × pi
TS = 3.04394672
From TS < value
Value (7.81472)
We fail to reject the null hypothesis at 5% value of significance
No, there is no age bias in the selection of jurors.
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