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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 77 90 90 78 56 99 61 87 71 88 83 84 56 81 75 103 60 - Past 88 89 93 94 66 84 84 92 88 91 89 91 Let u, be the recent times and let , be the past times. What are the null and alternative hypotheses? OA. H OB. H H =2 OD. H 2 OC. H H,: H 2 Calculate the test statistic. t= (Round to two decimal places as needed.) Find the P-value P-value = (Round to three 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 77 90 90 78 56 99 61 87 71 88 83 84 56 81 75 103 60 - Past 88 89 93 94 66 84 84 92 88 91 89 91 Let u, be the recent times and let , be the past times. What are the null and alternative hypotheses? OA. H OB. H H =2 OD. H 2 OC. H H,: H 2 Calculate the test statistic. t= (Round to two decimal places as needed.) Find the P-value P-value = (Round to three 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
Problem 1P
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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 77 90 90 78 56 99 61 87 71 88 83 84 56 81 75 103 60 - Past 88 89 93 94 66 84 84 92 88 91 89 91 Let u, be the recent times and let , be the past times. What are the null and alternative hypotheses? OA. H OB. H H =2 OD. H 2 OC. H H,: H 2 Calculate the test statistic. t= (Round to two decimal places as needed.) Find the P-value P-value = (Round to three 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 77 90 90 78 56 99 61 87 71 88 83 84 56 81 75 103 60 - Past 88 89 93 94 66 84 84 92 88 91 89 91 Let u, be the recent times and let , be the past times. What are the null and alternative hypotheses? OA. H OB. H H =2 OD. H 2 OC. H H,: H 2 Calculate the test statistic. t= (Round to two decimal places as needed.) Find the P-value P-value = (Round to three decimal places as needed.)
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