Suppose the 100 people in society c all know the same 10 facts, but the people in society d specialize slightly, so that there are nine facts that they all know, but each person also knows one unique fact. what is the minimum number of people that must live in society d in order for there to be twice as many facts known in society d as are known in society c?

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.