Question

in a test of a sex - selection technique, results consisted of 219 female babies and 226 male babies. based on this result, what is the probability of a female being born to a couple using this technique? does it appear that the technique is effective in increasing the likelihood that a baby will be a female?
the probability that a female will be born using this technique is approximately 0.492
(type an integer or decimal rounded to three decimal places as needed.)
does the technique appear effective in improving the likelihood of having a female baby?
○ no
○ yes

Explanation:

Step1: Calculate total babies

Total babies = 219 (female) + 226 (male) = 445.

Step2: Find female probability

Probability = $\frac{\text{Female babies}}{\text{Total babies}}$ = $\frac{219}{445}$ ≈ 0.492.

Step3: Compare with 0.5

Natural female birth probability is ~0.5. Here, 0.492 < 0.5, so the technique is not effective.

Answer:

No (the option "No")