Lashonda has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Lashonda has recorded the travel times for samples of thirteen trips via the 10 Freeway and thirteen trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-six trips. Travel times in minutes 10 Freeway 72, 73, 69, 71, 70, 69, 73, 73, 67, 70, 69, 78, 72 60 Freeway 71, 73, 77, 77, 76, 73, 73, 71, 75, 70, 73, 75, 74 Send data to calculator Send data to Excel Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.10 level of significance, that the mean travel time via the 10 freeway, u, is different from l, the mean travel time via the 60 freeway? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)

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Author:Amos Gilat
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(a) State the null hypothesis 
H0
 and the alternative hypothesis 
H1
.
H0:μ1−μ2=0
H1:μ1−μ2≠0
(b) Determine the type of test statistic to use.
  ▼t
Degrees of freedom: 
24
(c) Find the value of the test statistic. (Round to three or more decimal places.)
−0.9837
(d) Find the p-value. (Round to three or more decimal places.)
 
(e) Can we conclude that the mean travel time via the 10 freeway, 
μ1
, is different from 
μ2
, the mean travel time via the 60 freeway?
 
Yes 
 
No
 
 
 
Lashonda has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In
order to determine which way she should travel on a daily basis, Lashonda has recorded the travel times for samples of thirteen trips via the 10 Freeway and
thirteen trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-six trips.
Travel times in minutes
10 Freeway 72, 73, 69, 71, 70, 69, 73, 73, 67, 70, 69, 78, 72
60 Freeway 71, 73, 77, 77, 76, 73, 73, 71, 75, 70, 73, 75, 74
Send data to calculator
Send data to Excel
Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.10 level of
significance, that the mean travel time via the 10 freeway, µ1, is different from u,, the mean travel time via the 60 freeway?
Perform a two-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of
formulas.)
Transcribed Image Text:Lashonda has two ways to travel from her home in Norco to her office in Los Angeles. One is to go via the 10 Freeway, and the other is to go via 60 Freeway. In order to determine which way she should travel on a daily basis, Lashonda has recorded the travel times for samples of thirteen trips via the 10 Freeway and thirteen trips via the 60 Freeway. The following table gives the travel times (in minutes) for the twenty-six trips. Travel times in minutes 10 Freeway 72, 73, 69, 71, 70, 69, 73, 73, 67, 70, 69, 78, 72 60 Freeway 71, 73, 77, 77, 76, 73, 73, 71, 75, 70, 73, 75, 74 Send data to calculator Send data to Excel Assume that the two populations of travel times are normally distributed and that the population variances are equal. Can we conclude, at the 0.10 level of significance, that the mean travel time via the 10 freeway, µ1, is different from u,, the mean travel time via the 60 freeway? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)
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