A sample of 26 offshore oil workers took part in a simulated escape exercise, resulting in the accompanying data on time (sec) to complete the escape: 381 351 356 362 379 420 320 395 401 372 376 371 364 367 366 327 335 394 391 369 377 358 352 408 330 399 (a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Stems Leaves 32 34 35 36 37 38 39 40 41 33 mm 3 3 3 3 4 2 2 42 How does it suggest that the sample mean and median will compare? ○ The display is reasonably symmetric, so the mean and median will be close. O The display is negatively skewed, so the median will be greater than the mean. ○ The display is positively skewed, so the median will be greater than the mean. The display is negatively skewed, so the mean will be greater than the median. ○ The display is positively skewed, so the mean will be greater than the median. (b) Calculate the values of the sample mean x and median x. [Hint: Σx; = 9621.] (Round your answers to two decimal places.) x = x = sec sec (c) By how much could the largest time, currently 420, be increased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.) By how much could this value be decreased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.) (d) What are the values of x and x when the observations are reexpressed in minutes? (Round your answers to two decimal places.) min x= x = min
A sample of 26 offshore oil workers took part in a simulated escape exercise, resulting in the accompanying data on time (sec) to complete the escape: 381 351 356 362 379 420 320 395 401 372 376 371 364 367 366 327 335 394 391 369 377 358 352 408 330 399 (a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Stems Leaves 32 34 35 36 37 38 39 40 41 33 mm 3 3 3 3 4 2 2 42 How does it suggest that the sample mean and median will compare? ○ The display is reasonably symmetric, so the mean and median will be close. O The display is negatively skewed, so the median will be greater than the mean. ○ The display is positively skewed, so the median will be greater than the mean. The display is negatively skewed, so the mean will be greater than the median. ○ The display is positively skewed, so the mean will be greater than the median. (b) Calculate the values of the sample mean x and median x. [Hint: Σx; = 9621.] (Round your answers to two decimal places.) x = x = sec sec (c) By how much could the largest time, currently 420, be increased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.) By how much could this value be decreased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.) (d) What are the values of x and x when the observations are reexpressed in minutes? (Round your answers to two decimal places.) min x= x = min
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![A sample of 26 offshore oil workers took part in a simulated escape exercise, resulting in the accompanying data on time (sec) to complete the escape:
381
351 356 362 379 420 320 395 401
372
376 371 364
367 366 327 335 394
391 369 377
358 352 408 330 399
(a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.)
Stems Leaves
32
34
35
36
37
38
39
40
41
33 mm 3 3 3 3 4 2 2
42
How does it suggest that the sample mean and median will compare?
○ The display is reasonably symmetric, so the mean and median will be close.
O The display is negatively skewed, so the median will be greater than the mean.
○ The display is positively skewed, so the median will be greater than the mean.
The display is negatively skewed, so the mean will be greater than the median.
○ The display is positively skewed, so the mean will be greater than the median.
(b) Calculate the values of the sample mean x and median x. [Hint: Σx; = 9621.] (Round your answers to two decimal places.)
x =
x =
sec
sec
(c) By how much could the largest time, currently 420, be increased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.)
By how much could this value be decreased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.)
(d) What are the values of x and x when the observations are reexpressed in minutes? (Round your answers to two decimal places.)
min
x=
x =
min](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb898cad9-5347-4e0a-a74d-32f84bfad0f6%2Fab68d59c-665a-4c88-97f6-68243f2b11e6%2Fajrjwz_processed.png&w=3840&q=75)
Transcribed Image Text:A sample of 26 offshore oil workers took part in a simulated escape exercise, resulting in the accompanying data on time (sec) to complete the escape:
381
351 356 362 379 420 320 395 401
372
376 371 364
367 366 327 335 394
391 369 377
358 352 408 330 399
(a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.)
Stems Leaves
32
34
35
36
37
38
39
40
41
33 mm 3 3 3 3 4 2 2
42
How does it suggest that the sample mean and median will compare?
○ The display is reasonably symmetric, so the mean and median will be close.
O The display is negatively skewed, so the median will be greater than the mean.
○ The display is positively skewed, so the median will be greater than the mean.
The display is negatively skewed, so the mean will be greater than the median.
○ The display is positively skewed, so the mean will be greater than the median.
(b) Calculate the values of the sample mean x and median x. [Hint: Σx; = 9621.] (Round your answers to two decimal places.)
x =
x =
sec
sec
(c) By how much could the largest time, currently 420, be increased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.)
By how much could this value be decreased without affecting the value of the sample median? (Enter ∞ if there is no limit to the amount.)
(d) What are the values of x and x when the observations are reexpressed in minutes? (Round your answers to two decimal places.)
min
x=
x =
min
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