Answer:
A. Cohort study
Explanation:
It is basically a cohort study because in this we can evaluate the incident rate at a particular time for a particular disease. .
The options to choose from are: portal of exit, reservoir, portal of entry
The answers are JoAnn is the reservoir in the chain of transmission. The mucus from her cough is the portal of exit in the chain of transmission.
JoAnn is the reservoir because the cold is stored in her body. The mucus is the portal of exit because it is being coughed up outside the body.
I think all of the above, i hope that helps! :))
Answer:
(C) There is insufficient evidence that the vitamin improves the health of adults because at the 0.05 significance level, one could easily get statistically significant results in 2 out of 85 tests just due to chance variability.
Explanation:
T- tests is statistical tool that is used to determine if between the mean values of two groups there is a significant difference present.
It is used to test the hypothesis of an assumption that can be applied to a particular set or group of people.
In the question above, Option C is the valid conclusion because from the t-test carried out a significant level of 0.05 occured in two variables out of 85. Therefore there is insufficient evidence to prove that vitamin C improves the health of Adults.
Answer:
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