1. here are the finish times to the nearest minute) for 59 marathon runners.
261 270 236 244 278 296 284 297 287 287 250 256 338 360 341 333 261
267 287 296 313 311 309 309 299 303 277 283 304 305 286 290 286 287
297 299 332 330 309 329 309 329 285 291 295 298 306 315 310 318 318
320 333 321 323 324 327 302 319
a) using 5 classes, make a frequency table
b) make a relative frequency graph
c) comment on the shape of the graph (symmetrical, skewed right or skewed left)
d) draw an ogive graph
e) make a stem-and-leaf graph