The following data give the speeds of 13 cars, measured by radar, traveling on the interstate highway I-84.
67 72 63 66 76 69 71 76 65 79 68 67 71
A. Compute the values of the three quartiles and the interquartile range.
B. Calculate the(approximate) value of the 35th percentile.
C. Compute the percentile rank of 71.