Air traffic controllers perform the vital function of regulating the traffic of
ID: 3306536 • Letter: A
Question
Air traffic controllers perform the vital function of regulating the traffic of passenger planes. Frequently, air traffic controllers work long hours with little sleep. Researchers wanted to test their ability to make basic decisions as they become increasingly sleep deprived. To test their abilities, a sample of 6 air traffic controllers is selected and given a decision-making skills test following 12-hour, 24-hour, and 48-hour sleep deprivation. Higher scores indicate better decision-making skills. The table lists the hypothetical results of this study. Sleep Deprivation 12 Hours 24 Hours 48 Hours 22 16 15 18 20 20 32 22 20 25 19 12 21 13 14 19 20 14 (a) Complete the F-table. (Round your answers to two decimal places.) Source of Variation SS df MS Fobt Between groups 151 Correct: Your answer is correct. 2 Correct: Your answer is correct. 75.50 Correct: Your answer is correct. 4.70 Incorrect: Your answer is incorrect. Between persons 151 Incorrect: Your answer is incorrect. 2 Incorrect: Your answer is incorrect. 151 Incorrect: Your answer is incorrect. Within groups (error) 241 Incorrect: Your answer is incorrect. 17 Incorrect: Your answer is incorrect. 16.07 Incorrect: Your answer is incorrect. Total 392 Correct: Your answer is correct. 22 Incorrect: Your answer is incorrect. (b) Compute a Bonferroni procedure and interpret the results. (Assume experimentwise alpha equal to 0.05. Select all that apply.) There are no significant differences between any of the groups. There is a significant difference in decision making for the 12-hour and 24-hour sleep deprivation conditions. There is a significant difference in decision making for the 24-hour and 48-hour sleep deprivation conditions. There is a significant difference in decision making for the 12-hour and 48-hour sleep deprivation conditions. Incorrect: Your answer is incorrect.
Explanation / Answer
Answer:
Air traffic controllers perform the vital function of regulating the traffic of passenger planes. Frequently, air traffic controllers work long hours with little sleep. Researchers wanted to test their ability to make basic decisions as they become increasingly sleep deprived. To test their abilities, a sample of 6 air traffic controllers is selected and given a decision-making skills test following 12-hour, 24-hour, and 48-hour sleep deprivation. Higher scores indicate better decision-making skills. The table lists the hypothetical results of this study. Sleep Deprivation
12Hours 24Hours 48Hours
22 16 15
18 20 20
32 22 20
25 19 12
21 13 14
19 20 14
ANOVA
Sources
SS
df
MS
F
Groups
151.00
2
75.50
7.10
Between persons
134.67
5
26.93
2.53
Error
106.33
10
10.63
Total
392.00
17
(b) Compute a Bonferroni procedure and interpret the results. (Assume experimentwise alpha equal to 0.05. Select all that apply.)
Answer: There are no significant differences between any of the groups.
There is a significant difference in decision making for the 12-hour and 24-hour sleep deprivation conditions.
There is a significant difference in decision making for the 24-hour and 48-hour sleep deprivation conditions.
There is a significant difference in decision making for the 12-hour and 48-hour sleep deprivation conditions. Incorrect: Your answer is incorrect.
Pairwise Comparisons
Measure: MEASURE_1
(I) factor1
(J) factor1
Mean Difference (I-J)
Std. Error
Sig.a
95% Confidence Interval for Differencea
Lower Bound
Upper Bound
1
2
4.500
1.996
.222
-2.553
11.553
3
7.000
2.206
.074
-.796
14.796
2
1
-4.500
1.996
.222
-11.553
2.553
3
2.500
1.335
.360
-2.220
7.220
3
1
-7.000
2.206
.074
-14.796
.796
2
-2.500
1.335
.360
-7.220
2.220
Based on estimated marginal means
a. Adjustment for multiple comparisons: Bonferroni.
ANOVA
Sources
SS
df
MS
F
Groups
151.00
2
75.50
7.10
Between persons
134.67
5
26.93
2.53
Error
106.33
10
10.63
Total
392.00
17
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