Question

Determine whether the results appear to have statistical​ significance, and also determine whether the results appear to have practical significance. In a study of a gender selection method used to increase the likelihood of a baby being born a​ girl, 2086 users of the method gave birth to 1019 boys and 1067 girls. There is about a 15​% chance of getting that many girls if the method had no effect. Because there is a 15% chance of getting that many girls by chance, the method ______. ____ couples would likely use the procedure that raises the likelihood of a girl from the approximately 50% rate expected by chance to the ___% produced by this method.

Answer 1

Solution:

In a random sample of 2086 users, observed that the method gave birth to 1019 boys and 1067 girls.

There is about a 15% chance of getting many girls if the method has no effect.

Because there is 15% chance of getting that many girls by chance, observed that the method does not have statistical significance.

Given number of girls are 1067

Total number of babies is 2086

The percentage of girls is,

=1067/2086

= 0.5115

Not many couples would like to use a procedure that raises the likelihood of a girl from the approximately 51% rate expected by chance to the 51.15% produced by this method.

So, this method does not have practical significance.