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Question / Out of a group of 320 people exposed to infection, 255 had not been immunized, and of these 95 contracted the disease. Of those who had been immunized, 15 were infected. Does it seem that treatment gave any protection against the infection? Make null and alternative hypothesis. Write complete conclusion. Hint: Make the contingency table and perform Chi-square. Also, write the decision in terms of the question asked.

          Question /
Out of a group of 320 people exposed to infection, 255 had not been immunized, and of these 95
contracted the disease. Of those who had been immunized, 15 were infected. Does it seem that
treatment gave any protection against the infection? Make null and alternative hypothesis. Write
complete conclusion.
Hint: Make the contingency table and perform Chi-square. Also, write the decision in terms of the
question asked.

Question /
Out of a group of 320 people exposed to infection, 255 had not been immunized, and of these 95
contracted the disease. Of those who had been immunized, 15 were infected. Does it seem that
treatment gave any protection against the infection? Make null and alternative hypothesis. Write
complete conclusion.
Hint: Make the contingency table and perform Chi-square. Also, write the decision in terms of the
question asked.

Added by Nancy A.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Manisha Sarker

Step 1

- Null Hypothesis (H0): Immunization does not provide any protection against the infection. The infection rate is the same for both immunized and non-immunized individuals. - Alternative Hypothesis (H1): Immunization provides protection against the infection. The Show more…

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Question / Out of a group of 320 people exposed to infection, 255 had not been immunized, and of these 95 contracted the disease. Of those who had been immunized, 15 were infected. Does it seem that treatment gave any protection against the infection? Make null and alternative hypothesis. Write complete conclusion. Hint: Make the contingency table and perform Chi-square. Also, write the decision in terms of the question asked. Question/ Out of a group of 320 people exposed to infection,255 had not been immunized,and of these 95 contracted the disease. Of those who had been immunized, 15 were infected. Does it seem that treatment gave any protection against the infection? Make null and alternative hypothesis. Write complete conclusion. Hint: Make the contingency table and perform Chi-square. Also, write the decision in terms of the question asked.