Using a Significance Level of 0 A)related
B)not Related

question 20

Multiple Choice

Using a significance level of 0.05, test the claim that the two variables are independent. State whether the variables are related or not related.
-A medical researcher is interested in determining if there is a relationship between adults over 50 who walk regularly and low, moderate, and high blood pressure. A random sample of 236 adults over 50 is selected and the results are given below. $$\begin{array} { l | c c c } \text { Blood Pressure } & \text { Low } & \text { Moderate } & \text { High } \\\hline \text { Walkers } & 50 & 62 & 25 \\\text { Non-walkers } & 21 & 65 & 28\end{array}$$

• A)related
• B)not related

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Definitions:

Correlational Study

A research method used to determine the relationship between two variables, without inferring a cause-and-effect relationship.

Directionality Problem

An issue in correlational studies where it is unclear which variable causes changes in the other.

Third Variable Problem

A challenge in research where a correlation between two variables may be explained by the presence of a third variable that influences both.

Random Error

Variability in measurement or data that arises from unpredictable fluctuations during the data collection process.