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...

9.2-6

Hz O D. Ho H,
Extracted 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 89 78 57 99 63 86 69 89 82 82 55 80 73 103 62 Past 89 89 93 94 65 85 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 A. Ho HHz Hi Hi =Hz B. Ho H=H2 H, P2 O C. H, H =Hz H H>Hz O D. Ho H,

Jun 07, 2022

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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...

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