A auto maker is interested in information about how long transmissions last. A sample of transmissions are run constantly and the number of miles before the transmission fails is recorded. The auto maker claims that the transmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below. Miles (1000s of miles) Мean 150.7 Variance 4.661 Observations 46 Hypothesized Mean 150 df 45 t Stat 2.185 p = Ex: 1.234 P(T<=t) one-tail 0.017 t Critical one-tail 1.679 -2 -1 1 3 P(T<=t) two-tail t Critical two-tail 0.034 2.014 t = Ex: 1.234 Confidence Level(95.0%) 0.641 What condition is met for the use of a t-distribution? Pick n = Ex: 5 x = Ex: 1.2 Degrees of freedom= Ex: 5 s = Ex: 1.234

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A auto maker is interested in information about how long transmissions last. A sample of transmissions are run
constantly and the number of miles before the transmission fails is recorded. The auto maker claims that the
transmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below.
Miles (1000s of miles)
Мean
150.7
Variance
4.661
Observations
46
Hypothesized Mean
150
df
45
t Stat
2.185
Ex: 1.234
P(T<=t) one-tail
t Critical one-tail
P(T<=t) two-tail
t Critical two-tail
0.017
1.679
-3
-2
-1
1
0.034
2.014
t =
Ex: 1.234
Confidence Level(95.0%) 0.641
What condition is met for the use of a t-distribution? Pick
п 3D Ex: 5
Ex: 1.2
Degrees of freedom = Ex: 5
s = Ex: 1.234
18
Transcribed Image Text:Jump to level1 A auto maker is interested in information about how long transmissions last. A sample of transmissions are run constantly and the number of miles before the transmission fails is recorded. The auto maker claims that the transmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below. Miles (1000s of miles) Мean 150.7 Variance 4.661 Observations 46 Hypothesized Mean 150 df 45 t Stat 2.185 Ex: 1.234 P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail 0.017 1.679 -3 -2 -1 1 0.034 2.014 t = Ex: 1.234 Confidence Level(95.0%) 0.641 What condition is met for the use of a t-distribution? Pick п 3D Ex: 5 Ex: 1.2 Degrees of freedom = Ex: 5 s = Ex: 1.234 18
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