The following data the number of car thefts that occurred in a city during the past 12 days.
6 3 7 11 5 3 8 7 2 6 9 13
A. Determine the values of the three quartiles and the interquartile range. Where does the value of 9 lie in relation to these quartiles?
B. Calculate the (approximate) value of the 55th percentile.
C. Find the percentile rank of 8.