Suppose We Randomly Selected 250 People,and on the Basis of Their

question 87

Multiple Choice

Suppose we randomly selected 250 people,and on the basis of their responses to a survey we assigned them to one of two groups: high-risk group and low-risk group.We then recorded the blood pressure for the members of each group.Such data are called:

• A)observational.
• B)experimental.
• C)matched.
• D)None of these choices.

---

Definitions:

Volume

The amount of data generated.

Point Estimate

A single value estimate or guess of a population parameter based on sample data.

Sampling Error

The difference between the population parameter and the sample statistic due to chance variation in selecting a sample.

Nonsampling Error

Errors not related to the act of selecting a sample from the population but can occur during data collection, recording, or analysis stages.