Graded homework 2 - Graded homework 2 Question 1 1 Finish...

Graded homework 2
Question 1
1. Finish times (to the nearest hour) for 10 dogsled teams are shown below.
Make a frequency table showing class limits, class boundaries, midpoints, frequency,
relative frequencies, and cumulative frequencies. Use three classes. (Round your answer
for relative frequency to the nearest hundredth and for midpoint to the nearest tenth.)
308 262 310 268 299 249 257 286 236 278
2.
Class Limits Boundaries Midpoint Freq. Relative Freq. Cumulative
Freq.
236 260 235.5 260.5 248 3 0.3 3
261 284 260.5 284.5 273 3 0.3 6
285 308 284.5 308.5 297 4 0.4 10
Class Limits Boundaries Midpoint Freq. Relative Freq. Cumulative
Freq.
236 260 235.5 260.5 248 3 0.3 3
261 285 260.5 285.5 273 3 0.3 6
286 310 285.5 310.5 298 4 0.4 10
Class Limits Boundaries Midpoint Freq. Relative Freq. Cumulative
Freq.
236 260 235.5 260.5 248 4 0.3 3
261 284 260.5 285.5 273 5 0.3 6
285 310 285.5 310.5 297 5 0.4 10
Class Limits Boundaries Midpoint Freq. Relative Freq. Cumulative
Freq.
236 260 235.5 260.5 248 4 0.3 3
261 284 260.5 284.5 273 5 0.3 6
285 308 284.5 308.5 297 5 0.4 10
none of theses choices
1 points

Question 2
1. Finish times (to the nearest hour) for 57 dogsled teams are shown below. Draw a
histogram. Use five classes.
261 271 236 244 280 296 284 298 290 290 249 256
338 360 341 333 261 267 287 296 313 311 308 308
299 303 277 283 304 305 289 290 289 290 297 299
332 330 309 329 308 329 285 291 295 298 306 315
310 318 318 320 333 321 323 324 327
2.
The frequency table for the above data is given below.
Class Limits Boundaries Midpoint Freq. Relative Freq. Cumulative
Freq.
236 260 235.5 260.5 248 4 0.07 4
261 285 260.5 285.5 273 9 0.16 13
286 310 285.5 310.5 298 25 0.44 38
311 335 310.5 335.5 323 16 0.28 54
336 360 335.5 360.5 348 3 0.05 57
3.

1 points
Question 3
1. Finish times (to the nearest hour) for 60 dogsled teams are shown below. Use five classes.
Categorize the basic distribution shape as uniform or rectangular, mound-shaped
symmetric, bimodal, skewed left, or skewed right.

Bimodal
Uniform or rectangular
mound-shaped symmetric
Skewed right
none of these choices
1 points
Question 4
1. Finish times (to the nearest hour) for 57 dogsled teams are shown below. Use five classes.
Categorize the basic distribution shape as uniform, mound-shaped symmetric, bimodal,
skewed left, or skewed right.
The relative frequency histogram of the above data is given below.
approximately skewed left
approximately bimodal
approximately uniform or rectangular
approximately mound-shaped symmetric
approximately skewed right
1 points

Question 5
1. Assume that the following data represent baseball batting averages (multiplied by 1000)
for a random sample of National League players near the end of the baseball season. The
frequency table showing class limits, class boundaries, midpoints and frequency is given
below. Draw a histogram.
Class Limits Boundaries Midpoint Frequency
107 149 106.5 149.5 128.0 3
150 192 149.5 192.5 171.0 4
193 235 192.5 235.5 214.0 3
236 278 235.5 278.5 257.0 10
279 321 278.5 321.5 300.0 6
2.

none of these choices
1 points
Question 6
1. At Westgate Community College, a survey was done to determine when students are
available for class. A questionnaire was given to a random sample of students. The
instructions were to mark each of the time categories in which they could take classes.