Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a​ girl, but assume that the method has no​ effect, so the probability of a girl is . Assume that the groups consist of couples. Complete parts​ (a) through​ (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of births. The value of the mean is nothing. ​(Type an integer or a decimal. Do not​ round.) The value of the standard deviation is nothing. ​(Round to one decimal place as​ needed.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of nothing girls or fewer are significantly low. ​(Round to one decimal place as​ needed.) Values of nothing girls or greater are significantly high. ​(Round to one decimal place as​ needed.) c. Is the result of girls a result that is significantly​ high? What does it suggest about the effectiveness of the​ method? The result ▼ is is not significantly​ high, because girls is ▼ greater than less than equal to nothing girls. A result of girls would suggest that the method ▼ is effective. is not effective. ​(Round to one decimal place as​ needed.)