Expert answer:Sample Mean of commuter train transit time

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HOMEWORK
A person takes a new job, and is experimenting with different routes into work. Two
different routes are taken. The first route is by commuter train, and 12 transit times in
minutes are recorded. Then, the person drives in for 11 days, and records those tnnsit times.
At the 95% confidence level, is there sufficient evidence at this time to indicate that the
commuter train is faster than driving.
Commuter
train
Drive
31
26
23
34
45
26
22
25
27
50
42
21
24
51
27
28
27
32
33
62
30
20
a. State the null hypothesis.
b. State the alternative hypothesis.
c. State the significance level.
d. Perform the calculations. Use the reverse side as necessary.
e. Should we fail to reject the null hypothesis? Answer only one.
Yes, because:
or
No, because:
…
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