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Chapter 1: Q.33 (page 52)

Patients who used the software were also a part of an exercise program whereas patients who did not use the software

were not. Does this change the validity of the conclusions from Exercise 1.31?

Short Answer

Expert verified

Yes, it calls into question the validity of the original study's findings.

Step by step solution

01

Given Information

Yes, because we can't identify whether the improvement was due to the programs or the exercise; the data is muddled, and it's impossible to form a meaningful judgement. New research should be carried out.

02

Explanation

If the study includes two independent factors: exercise program and software use, and then the observations are made, the statistical observations will be interpreted very differently. We do not believe that the program is capable of achieving considerable progress on its own. The workout program may have contributed to the improvement. As a result, the validity of the first study's conclusions is impacted.

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Most popular questions from this chapter

Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34

Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

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