Statistical Significance and Practical Significance The Technogene Research Group has developed a procedure designed to increase the likelihood that a baby will be born a girl. In a clinical trial of their procedure, 236 girls were born to 450 different couples. If the method has no effect, there is about a 15% chance that such extreme results would occur. Does the procedure appear to have statistical significance? Does the procedure appear to have practical significance?

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Asked Dec 26, 2019
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Statistical Significance and Practical Significance The Technogene Research Group has developed a procedure designed to increase the likelihood that a baby will be born a girl. In a clinical trial of their procedure, 236 girls were born to 450 different couples. If the method has no effect, there is about a 15% chance that such extreme results would occur. Does the procedure appear to have statistical significance? Does the procedure appear to have practical significance?

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Expert Answer

Step 1

Statistical significance:

In the study, when the result obtained is very unlikely to occur just by chance alone, then the statistical significance is achieved. The general criterion for statistical significance is the likelihood of occurring of an event just by chance is 5% or less. When a treatment is tested, the statistical significance gives the conclusion about how the treatment is unlikely to be effective just by chance alone.

In this procedure, it is mentioned that there would be 15% chance that a baby girl would be born from the couples. This implies that giving birth to a baby girl is not very unlikely to occur just by chance alone. Also, 15% is greater than general criterion for the statistical significance of 5%.

Thus, the procedure does not appear to have statistical significance.

Step 2

Practical significance:

The practical significance states that even if the treatment tested is effective, in common sense or practically the treatment tested would not make enough difference with ...

Statistics homework question answer, step 2, image 1
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