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The Practice of Statistics for AP
Found in: Page 731
The Practice of Statistics for AP

The Practice of Statistics for AP

Book edition 4th
Author(s) David Moore,Daren Starnes,Dan Yates
Pages 809 pages
ISBN 9781319113339

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Short Answer

Design (4.2) Was this an observational study or an experiment? Justify your answer.

The study is the experimental study.

See the step by step solution

Step by Step Solution

Step 1: Given Information

The data is given in the question that,

Step 2: Explanation

Observational study: An observational study is one where the participants are simply monitored based on certain criteria without changing them.

Experimental Study:

If some treatments are applied to the individuals in order to observe the effectiveness of the treatments then the study is termed an experimental study.

A study is conducted to determine whether the answers of the respondents are being affected if the rating scale is changed or not. For this a simple random sample of 90 students is selected from the total population of 1000 students. The first 45 students are given a scale of 1 to 5 and the remaining 45 students are given a scale of 0 to 4.

In this study: the different scaling is given to two groups of students for observing the effect of scale on the responses to the question. This shows that: the study is an experiment.

Thus, the study is an experimental study.

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