Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is design 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 0.5 assume that the groups consist of 40 couples. Find the value of the mean

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Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is design 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 0.5 assume that the groups consist of 40 couples. Find the value of the mean 

Find the value of the standard deviation

usw the range tule of thumb to find the value separating results that are significant low or high 

Is the result of 31 girls a result that is significant high? What does it suggest about the effectiveness of this method 

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