Please some help in applied statistic A sample of 26 offshore oil workers took p
ID: 3201877 • Letter: P
Question
Please some help in applied statistic
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:
398
384 351 355 362 379 425 322 395 402 372 375 372 364 368 364 329 335 394 392 369 376 358 352 409 332398
384 351 355 362 379 425 322 395 402 372 375 372 364 368 364 329 335 394 392 369 376 358 352 409 332 398 a) Construct a stem-and-leaf play of the data numbers from Enter smallest to largest separated by spaces. Enter NONE for stems with no values Stems Leaves 32 55 33 49 34 35 6699 36 34469 37 03345 38 9 39 2347 40 23 41 42 4 How does it suggest that the sample mean and median w compare O The display is negatively skewed, so the median will be greater than the mean The display is reasonably symmetric, so the mean and median will be close. O The display is negatively skewed, so the mean will be greater than the median O The display is positively skewed, so the median will be greater than the mean The display is positively skewed, so the mean will be greater than the medianExplanation / Answer
Result:
Frequency
Stem
Leaf
2
32
2 9
2
33
2 5
0
34
NONE
4
35
1 2 5 8
5
36
2 4 4 8 9
5
37
2 2 5 6 9
1
38
4
4
39
2 4 5 8
2
40
2 9
0
41
NONE
1
42
5
The display is reasonably symmetric so the mean and median will be close.
Mean = 370.54
Median =370.50
c).
The value to be increased =
The value to be decreased =53
d).
mean =6.18 min
median = 6.18 min
Frequency
Stem
Leaf
2
32
2 9
2
33
2 5
0
34
NONE
4
35
1 2 5 8
5
36
2 4 4 8 9
5
37
2 2 5 6 9
1
38
4
4
39
2 4 5 8
2
40
2 9
0
41
NONE
1
42
5