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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 79 90 89 80 58 100 63 88 71 87 81 82 55 80 74 102 60 Past 89 88 93 94 65 84 86 92 87 91 91 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? A. Ho: H1 = H2 H,: Hq> H2 B. Ho: H1 # H2 H;: H1 = H2 Cc. Ho: H1 = H2 D. Ho: H1< H2 H4: H1 = H2 Calculate the test statistic. t = (Round to two decimal places as needed.)

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 79 90 89 80 58 100 63 88 71 87 81 82 55 80 74 102 60 Past 89 88 93 94 65 84 86 92 87 91 91 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? A. Ho: H1 = H2 H,: Hq> H2 B. Ho: H1 # H2 H;: H1 = H2 Cc. Ho: H1 = H2 D. Ho: H1< H2 H4: H1 = H2 Calculate the test statistic. t = (Round to two decimal places as needed.)

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
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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 79 90 89 80 58 100 63 88 71 87 81 82 55 80 74 102 60 Past 89 88 93 94 65 84 86 92 87 91 91 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? A. Ho: H1 = H2 H,: Hq> H2 B. Ho: H1 # H2 H;: H1 = H2 Cc. Ho: H1 = H2 D. Ho: H1< H2 H4: H1 = H2 Calculate the test statistic. t = (Round to two decimal places as needed.)
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 79 90 89 80 58 100 63 88 71 87 81 82 55 80 74 102 60 Past 89 88 93 94 65 84 86 92 87 91 91 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? A. Ho: H1 = H2 H,: Hq> H2 B. Ho: H1 # H2 H;: H1 = H2 Cc. Ho: H1 = H2 D. Ho: H1< H2 H4: H1 = H2 Calculate the test statistic. t = (Round to two decimal places as needed.)
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