40. How much confidence? In a survey of 200 adult women in a certain city, the mean number of children they had was 2.3 with a standard deviation of 1.2. A sociologist states that the mean number of children per woman in this city is between 2. 13 and 2.47. With what level of confidence can this claim be made? 41. Don't construct a confidence interval: There have been 44 presidents of the linited Stated