An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto their Long Beach (LGB) to San Francisco (SFO) flights. Option 1 has more automation, the airline suspects that the mean Option 1 loading time is less than the mean Option 2 loading time. To see if this is tru airline selects a random sample of 245 flights from LGB to SFO using Option 1 and records their loading times. The sample mean is found to be 17.7 min with a sample standard deviation of 5.6 minutes. They also select an independent random sample of 295 flights from LGB to SFO using Option 2 and reco their loading times. The sample mean is found to be 18.3 minutes, with a sample standard deviation of 4.0 minutes. Since the sample sizes are quite large assumed that the population standard deviation of the loading times using Option 1 and the loading times using Option 2 can be estimated to be the samp standard deviation values given above. At the 0.05 level of significance, is there sufficient evidence to support the claim that the mean Option 1 loading tim , is less than the mean Option 2 loading time, μ₂, for the airline's flights from LGB to SFO? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H₁. H O Р Ho :D H₁:0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three or more decimal places.) (e) Can we support the claim that the mean Option 1 loading time is less than the mean Option 2 loading time for the airline's flights from LGB to SFO? Yes No Ix X 9 X P S 00 OSO 020 O0 3 ? plo

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E
An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto their Long Beach (LGB) to San Francisco (SFO) flights. Since
Option 1 has more automation, the airline suspects that the mean Option 1 loading time is less than the mean Option 2 loading time. To see if this is true, the
airline selects a random sample of 245 flights from LGB to SFO using Option 1 and records their loading times. The sample mean is found to be 17.7 minutes,
with a sample standard deviation of 5.6 minutes. They also select an independent random sample of 295 flights from LGB to SFO using Option 2 and record
their loading times. The sample mean is found to be 18.3 minutes, with a sample standard deviation of 4.0 minutes. Since the sample sizes are quite large, it is
assumed that the population standard deviation of the loading times using Option 1 and the loading times using Option 2 can be estimated to be the sample
standard deviation values given above. At the 0.05 level of significance, is there sufficient evidence to support the claim that the mean Option 1 loading time, μ₁
, is less than the mean Option 2 loading time, μ₂, for the airline's flights from LGB to SFO? Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
μ
о р
0
Ho:
H₁ :D
X
S
(b) Determine the type of test statistic to use.
(Choose one)
0=0
OSO
(c) Find the value of the test statistic. (Round to three or more decimal places.)
0#0 0<0
0>0
?
хб
(d) Find the p-value. (Round to three or more decimal places.)
0
(e) Can we support the claim that the mean Option 1 loading time is less than
the mean Option 2 loading time for the airline's flights from LGB to SFO?
Yes No
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Explanation
DII
|x
<Q
020
F9
Privacy Center
7
F10
Accessibility
Ý
F11
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Aa
18
0
Transcribed Image Text:E An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto their Long Beach (LGB) to San Francisco (SFO) flights. Since Option 1 has more automation, the airline suspects that the mean Option 1 loading time is less than the mean Option 2 loading time. To see if this is true, the airline selects a random sample of 245 flights from LGB to SFO using Option 1 and records their loading times. The sample mean is found to be 17.7 minutes, with a sample standard deviation of 5.6 minutes. They also select an independent random sample of 295 flights from LGB to SFO using Option 2 and record their loading times. The sample mean is found to be 18.3 minutes, with a sample standard deviation of 4.0 minutes. Since the sample sizes are quite large, it is assumed that the population standard deviation of the loading times using Option 1 and the loading times using Option 2 can be estimated to be the sample standard deviation values given above. At the 0.05 level of significance, is there sufficient evidence to support the claim that the mean Option 1 loading time, μ₁ , is less than the mean Option 2 loading time, μ₂, for the airline's flights from LGB to SFO? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. μ о р 0 Ho: H₁ :D X S (b) Determine the type of test statistic to use. (Choose one) 0=0 OSO (c) Find the value of the test statistic. (Round to three or more decimal places.) 0#0 0<0 0>0 ? хб (d) Find the p-value. (Round to three or more decimal places.) 0 (e) Can we support the claim that the mean Option 1 loading time is less than the mean Option 2 loading time for the airline's flights from LGB to SFO? Yes No Ⓒ2022 McGraw Hill LLC All Rights Reserved. Terms of Use Check Explanation DII |x <Q 020 F9 Privacy Center 7 F10 Accessibility Ý F11 (1) F12 Aa 18 0
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