[EX02-114] The fatality rate on the nation’s highways in 2003 was the lowest since record keeping began 29 years ago, but these numbers are still mind-boggling. The number of persons killed in motor vehicle traffic crashes, by state, including the District of Columbia, in 2003 is listed here:

1001 294 135 471 462 262 439 668 203 943 95 142 293 928 1283 293 1491 512 1193 600 1120 67 1453 894 657 368 1531 1577 3675 394 627 3169 834 207 871 127 105 104 309 848 4215 1603 441 649 1232 747 1277 968 69 165 632 Source: Road & Travel Magazine, 2004

a. Draw a dotplot of the fatality data.

b. Draw a stem-and-leaf display of these data.

c. Find the 5-number summary and draw a boxand-

whiskers display. Describe how the three large-valued data are handled.

d. Find P10 and P90.

e. Describe the distribution of number of fatalities per state, being sure to include information learned in parts a through d.

f. Why might it be unfair to draw conclusions about the relative safety level of highways in the 50 states and District of Columbia based on these data?