4. The table given below shows the data obtained during outbreak of smallpox: Attacked 31 Not attacked 469 Total 500 Vaccinated Not vaccinated Total Test the effectiveness of vaccination in preventing the attack from smallpox. with the help of x2 at 5 per cent level of significance. 185 1315 1500 216 1784 2000 Test your result

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4. The table given below shows the data obtained during outbreak of smallpox:
Attacked
Not attacked
Total
Vaccinated
Not vaccinated
Total
31
469
500
185
1315
1500
216
1784
2000
Test the effectiveness of vaccination in preventing the attack from smallpox. Test your result
with the help of x? at 5 per cent level of significance.
Transcribed Image Text:4. The table given below shows the data obtained during outbreak of smallpox: Attacked Not attacked Total Vaccinated Not vaccinated Total 31 469 500 185 1315 1500 216 1784 2000 Test the effectiveness of vaccination in preventing the attack from smallpox. Test your result with the help of x? at 5 per cent level of significance.
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