Homework SourseThe table below shows the mean number of daily errors by sev
The table below shows the mean number of daily errors by seven air traffic controller trainees during the first two weeks on the job. We want to perform a paired t-test at = .05 to see if the mean daily errors have decreased from Week 1 to Week 2.
The right-tailed critical value at = 0.05 is:
A. 1.943
B. 2.365
C. 2.447
D. 1.895
| TRAINEE | |||||||
| T1 | T2 | T3 | T4 | T5 | T6 | T7 | |
| WEEK 1 | 5.1 | 3 | 12.1 | 6.2 | 11.5 | 7.8 | 2.2 |
| WEEK 2 | 3.2 | 2.2 | 8.7 | 7.7 | 9.4 | 7.8 | 3.1 |
Solution
The right-tailed critical value at = 0.05 , with d.f. =n-1= 7-1 = 6
t0.05,6 = 1.943
Hence correct option is
A. 1.943
