Two square sheets of cardboard used for making book covers differ in area by 81 square inches. an edge of the large square is 3 inches greater than an edge of the smaller square. find the length of an edge of the smaller square.

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.