{8,15,9,18,9,17,22,10,11,9,13}
what is the interquartile range of the data set?
i also need friends and people to talk to sooo, anyone?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)