Question 25 1 1 point State your conclusion to the hypothesis test In the

Question 25 1 1 point state your conclusion to the

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Question 25 1 / 1 point State your conclusion to the hypothesis test. In the initial test of the Salk vaccine for polio, 400,000 children were selected and divided into two groups of 200,000. One group was vaccinated with the Salk vaccine while the second group was vaccinated with a placebo. Of those vaccinated with the Salk vaccine, 33 later developed polio. Of those receiving the placebo, 115 later developed polio. Test the claim that the Salk vaccine is effective in lowering the polio rate. Use State the conclusion. Hint: the test statistic is z = -6.74 There is sufficient evidence to suggest that the average number of people who were diagnosed with Polio was reduced by taking the Salk vaccine. There is insufficient evidence to suggest that the proportion of people who were diagnosed with Polio was reduced by taking the Salk vaccine. We cannot reject the null hypothesis at the 1% level of significance. There is sufficient evidence to suggest that the proportion of people who were diagnosed with Polio was reduced by taking the Salk vaccine.
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