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A survey was conducted by an independent price-checking company to check an advertiser's claim that it had lower prices than its competitors. The average weekly total, based on the prices of approximately 95 items, is given for this chain and for its competito recorded during four consecutive weeks in a particular month. Week Advertiser ($) Competitor ($) 254.20 256.03 240.71 255.68 231.81 255.15 234.20 261.24 A USE SALT (a) Is there a significant difference in the average prices for these two different supermarket chains? (Use a = 0.05. Use u,advertiser - Hcompetitor " H) State the null and alternative hypotheses. O Hại H =0 versus H: H> 0 O Họ: Hg0 versus H: H-0 O Ho: H =0 versus H: H <0 O Hạ: H-0 versus H: H 0 O Hạ: H <0 versus H: H> o State the test statistic. (Round your answer to three decimal places.) State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) State the conclusion. O Ho is rejected. There is insufficient evidence to indicate that the means are different. O H, is rejected. There is sufficient evidence to indicate that the means are different. O Ho is not rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is insufficient evidence to indicate that the means are different.

A survey was conducted by an independent price-checking company to check an advertiser's claim that it had lower prices than its competitors. The average weekly total, based on the prices of approximately 95 items, is given for this chain and for its competito recorded during four consecutive weeks in a particular month. Week Advertiser ($) Competitor ($) 254.20 256.03 240.71 255.68 231.81 255.15 234.20 261.24 A USE SALT (a) Is there a significant difference in the average prices for these two different supermarket chains? (Use a = 0.05. Use u,advertiser - Hcompetitor " H) State the null and alternative hypotheses. O Hại H =0 versus H: H> 0 O Họ: Hg0 versus H: H-0 O Ho: H =0 versus H: H <0 O Hạ: H-0 versus H: H 0 O Hạ: H <0 versus H: H> o State the test statistic. (Round your answer to three decimal places.) State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) State the conclusion. O Ho is rejected. There is insufficient evidence to indicate that the means are different. O H, is rejected. There is sufficient evidence to indicate that the means are different. O Ho is not rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is insufficient evidence to indicate that the means are different.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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(b) What is the approximate p-value for the test conducted in part (a)? O p-value < 0.010 O 0.010 < p-value < 0.020 O 0.020 < p-value < 0.050 O 0.050 < p-value < 0.100 O 0.100 < p-value < 0.200 O p-value > 0.200 (c) Construct a 99% confidence interval for the difference in the average prices for the two supermarket chains. (Use uadvertiser - Hcompetitor: Round your answers to two decimal places.) $4 to $ Interpret this interval. O Since 0 falls in the confidence interval, there is insufficient evidence to indicate that the means are different. O Since 0 does not fall in the confidence interval, there is insufficient evidence to indicate that the means are different. O Since 0 does not fall in the confidence interval, there is sufficient evidence to indicate that the means are different. O Since 0 falls in the confidence interval, there is sufficient evidence to indicate that the means are different.
Transcribed Image Text:(b) What is the approximate p-value for the test conducted in part (a)? O p-value < 0.010 O 0.010 < p-value < 0.020 O 0.020 < p-value < 0.050 O 0.050 < p-value < 0.100 O 0.100 < p-value < 0.200 O p-value > 0.200 (c) Construct a 99% confidence interval for the difference in the average prices for the two supermarket chains. (Use uadvertiser - Hcompetitor: Round your answers to two decimal places.) $4 to $ Interpret this interval. O Since 0 falls in the confidence interval, there is insufficient evidence to indicate that the means are different. O Since 0 does not fall in the confidence interval, there is insufficient evidence to indicate that the means are different. O Since 0 does not fall in the confidence interval, there is sufficient evidence to indicate that the means are different. O Since 0 falls in the confidence interval, there is sufficient evidence to indicate that the means are different.
A survey was conducted by an independent price-checking company to check an advertiser's claim that it had lower prices than its competitors. The average weekly total, based on the prices of approximately 95 items, is given for this chain and for its competitor recorded during four consecutive weeks in a particular month. Week Advertiser ($) Competitor ($) 1 254.20 256.03 2 240.71 255.68 3 231.81 255.15 234.20 261.24 n USE SALT (a) Is there a significant difference in the average prices for these two different supermarket chains? (Use a = 0.05. Use uadvertiser - Hcompetitor = H) State the null and alternative hypotheses. O Ho: H4 = 0 versus H: H > 0 O Ho: Hd#0 versus H: H = 0 O Ho: H = 0 versus H,: 4, < 0 O Ho: H = 0 versus H,: 4* 0 O Ho: H <0 versus H: Ha > 0 State the test statistic. (Round your answer to three decimal places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t > t < State the conclusion. O H, is rejected. There is insufficient evidence to indicate that the means are different. O H, is rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is insufficient evidence to indicate that the means are different.
Transcribed Image Text:A survey was conducted by an independent price-checking company to check an advertiser's claim that it had lower prices than its competitors. The average weekly total, based on the prices of approximately 95 items, is given for this chain and for its competitor recorded during four consecutive weeks in a particular month. Week Advertiser ($) Competitor ($) 1 254.20 256.03 2 240.71 255.68 3 231.81 255.15 234.20 261.24 n USE SALT (a) Is there a significant difference in the average prices for these two different supermarket chains? (Use a = 0.05. Use uadvertiser - Hcompetitor = H) State the null and alternative hypotheses. O Ho: H4 = 0 versus H: H > 0 O Ho: Hd#0 versus H: H = 0 O Ho: H = 0 versus H,: 4, < 0 O Ho: H = 0 versus H,: 4* 0 O Ho: H <0 versus H: Ha > 0 State the test statistic. (Round your answer to three decimal places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t > t < State the conclusion. O H, is rejected. There is insufficient evidence to indicate that the means are different. O H, is rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is sufficient evidence to indicate that the means are different. O H, is not rejected. There is insufficient evidence to indicate that the means are different.
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