# applied biostatistics in 12 hours or less

Unit III Assessment

11 OF 11 QUESTIONS REMAINING

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Question 1 4 Points

What is the probability that a woman delivers pre-term?

Question 2 4 Points

What is the probability that a woman has BMI less than 30?

Question 3 4 Points

What is the probability that a woman has a BMI less than 30 and delivers pre-term?

Question 4 4 Points

What proportion of women with a BMI greater than 35 delivers full-term?

Question 5 6 Points

What is the sensitivity of the new rapid test for HIV? Interpret your results.

Question 6 6 Points

What is the specificity of the new rapid test for HIV? Interpret your results.

Question 7 6 Points

What is the positive predictive value (PPV) for the new rapid test for HIV in this cohort? Interpret your results.

Question 8 6 Points

What is the negative predictive value (NPV) for the new rapid test for HIV in this cohort? Interpret your results.

Question 9 20 Points

Explain in your own words the difference between a random experiment and a trial. Illustrate each by giving a real-
world example of how each has been applied in a public health setting in the last decade. Be sure to include the
specifics that make each distinct.
Your response must be at least 200 words in length.

Question 10 20 Points

Explain in your own words how probability laws and concepts are used in the evaluation of screening tests and
diagnostic criteria in public health. Offer two examples to support your explanation. You do not need to provide
calculations but, rather, a summary of the two scenarios and the data to which the distribution would be applied and
evaluated.
Your response must be at least 200 words in length.

Question 11 20 Points

Compare and contrast binomial and normal distributions. Give an example of each being used in a public health
setting. You do not need to provide calculations but, rather, a summary of the scenario and the data to which the
distribution would be applied and evaluated.
Your response must be at least 200 words in length.

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