Chapter 2.1, Problem 15P

For Problems 15-20. use the specified number of classes to do the following.

(a) Find the class width

(b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies. relative frequencies, and cumulative frequencies.

(c) Draw a histogram.

(d) Draw a relative- frequency histogram.

(e) Categorize the basic distribution shape as uniform, mound-shaped symmetric, binodal, skewed left, orskewed right.

(f) Draw an ogive.

(g) Interpretation Discuss some of the features about the data that the graphs reveal. Consider items such as dat range, location of the middle half of the data, unusual values, cutlers, etc.

Sports: DogsledRacing How long does it take to finish the 1161-mile Iditarod Sled Dog Race from Anchorage to Nome. Alaska (see Viewpoint)? Finish times (to the nearest hour) for 57 dogsled teams are shown below.

261	271	236	244	279	296	284	299	288	288	247	256
338	360	341	333	261	266	247	296	313	311	307	307
209	306	277	283	304	305	288	290	288	289	297	299
332	330	309	328	307	328	245	291	295	298	306	315
310	318	318	320	333	321	323	324	327

Use five classes.