Consider the Data Table Showing Epidemiology Data for 25 Individuals

question 37

Multiple Choice

Consider the data table showing epidemiology data for 25 individuals with a disease and 25 healthy comparison individuals. Their deaths are recorded over a period of 12 months.
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$\begin{array}{c}\underline { \text { Diseased } } \quad \quad \quad \quad \quad \quad \quad \quad\underline { \text { Healthy}}\\\begin{array}{cccc}\text { Time } & \text { \# at risk } & \text { Deaths } & \text { \# at risk } & \text { Deaths } \\2 & 25 & 1 & 25 & 2 \\4 & 24 & 3 & 23 & 5 \\6 & 21 & 1 & 18 & 4 \\8 & 20 & 2 & 13 & 3 \\10 & 18 & 0 & 10 & 1 \\12 & 18 & 1 & 9 & 2\end{array}\end{array}$
-What proportion of individuals died during the interval between 6 and 8 months after starting the trial?

• A) 0.128
• B) 0.152
• C) 0.170
• D) 0.197

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Definitions:

Analysis of Variance (ANOVA)

A statistical method used to compare the means of three or more samples to understand if at least one of the sample means significantly differs from the others.

Type I Error

The faulted rejection of an authentic null hypothesis, also termed as a "false positive."

Type II Error

The error that occurs when a statistical test fails to reject a false null hypothesis, also known as a "false negative" result.

Statistical Outcome

The result of any single observation or measurement regarding a statistical experiment.