Assume that different groups of couples use a particular methodof gender selection and each couple gives birth to one baby. Thismethod is designed to increase the likelihood that each baby willbe a​ girl, but assume that the method has no​ effect, so theprobability of a girl is 0.5. Assume that the groups consist of 26couples. Complete parts​ (a) through​ (c) below. a. Find the meanand the standard deviation for the numbers of girls in groups of 26births. The value of the mean is muequals nothing. ​(Type aninteger or a decimal. Do not​ round.) The value of the standarddeviation is sigmaequals nothing. ​(Round to one decimal place as​needed.) b. Use the range rule of thumb to find the valuesseparating results that are significantly low or significantlyhigh. Values of nothing girls or fewer are significantly low.​(Round to one decimal place as​ needed.) Values of nothing girlsor greater are significantly high. ​(Round to one decimal place as​needed.) c. Is the result of 23 girls a result that issignificantly​ high? What does it suggest about the effectivenessof the​ method? The result ▼ is not is significantly​ high, because23 girls is ▼ less than equal to greater than nothing girls. Aresult of 23 girls would suggest that the method ▼ is effective. isnot effective. ​(Round to one decimal place as​ needed.)