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Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 78 91 88 78 58 100 63 86 70 88 81 82 56 82 73 101 62 Past 90 88 93 94 63 84 86 92 86 91 90 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? O B. Ho: H = H2 H: H>H2 OA. Ho: H1= H H: H H2 OC. Hg: HH2 O D. Ho: H

Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 78 91 88 78 58 100 63 86 70 88 81 82 56 82 73 101 62 Past 90 88 93 94 63 84 86 92 86 91 90 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? O B. Ho: H = H2 H: H>H2 OA. Ho: H1= H H: H H2 OC. Hg: HH2 O D. Ho: H

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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Does it appear that the mean time interval has change ? Is the conclusion affected by whether the significance level is 0.10 or 0.01v
Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 78 91 88 78 58 100 63 86 70 88 81 82 56 82 73 101 62 Past 90 88 93 94 63 84 86 92 86 91 90 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? O B. Ho: H1 = H2 H: H> H2 O A. Ho: H1=H O D. Ho: H <Hz H: H =H2 OC. Ho: H H2 H: H, = H2
Transcribed Image Text:Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 78 91 88 78 58 100 63 86 70 88 81 82 56 82 73 101 62 Past 90 88 93 94 63 84 86 92 86 91 90 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? O B. Ho: H1 = H2 H: H> H2 O A. Ho: H1=H O D. Ho: H <Hz H: H =H2 OC. Ho: H H2 H: H, = H2
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