Question

In Exercises 9–12, assume that 50 births are randomly selected. Use subjective judgment to describe the given number of girls as (a) significantly low, (b) significantly high, or (c) neither significantly low nor significantly high.

47 girls.

Short answer

47 girls can be considered significantly high. Thus, option (b) is the correct answer.

Step-by-step solution

Given information

Out of the 50 randomly selected births, 47 are girls.

Significance of the number of girls

It is given that the total number of births is equal to 50.

The number of girls is equal to 47.

Thus, the number of boys becomes equal to:

$50-47=3$

Rationally, the number of girls should be approximately equal to the number of boys.

• Values of the number of girls that are very large can be considered significantly high.
• Values of the number of girls that are very small can be considered significantly low.
• Values of the number of girls around 25 can be considered neither significantly low nor significantly high.

Here, out of the 50 births, there are 47 girls and only 3 boys.

This concludes that the number of girls (equal to 47) is significantly high.

Thus, option (b) is the appropriate judgement.