We carry out a chi-square test of independence, the chi-square statistic is based on (rxc) -1 degrees of freedom, where r and c denote, respectively, the number of rows and columns in the contingency table.

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Find the area of a parallelogram with base 15 yards and height 21 2/3

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?