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 simplerandom 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 thesignificance level is 0.10 or 0.01?Recent78 91 88 78 56 99 62 86 70 88 83 82 55 80 74 102 61 DPast88 87 93 94 63 86 84 92 87 91 90 91Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses?O A. Ho H, H2O B. 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 simplerandom 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 thesignificance level is 0.10 or 0.01?Recent78 91 88 78 56 99 62 86 70 88 83 82 55 80 74 102 61Past88 87 93 94 63 86 84 92 87 91 90 91P-value = (Round to three decimal places as needed.)Make a conclusion about the null hypothesis and a final conclusion that addresses the original claim. Use a significance level of 0.10H, because the P-value isV the significance level. ThereV sufficient evidence that the mean time interval has changed.Is the conclusion affected by whether the significance level is 0.10 or 0.01?O A. Yes, the conclusion is affected by the significance level because H, is rejected when the significance level is 0.01 but is not rejected when the significance level is 0.10.O B. Yes, the conclusion is affected by the significance level because H, is rejected when the significance level is 0.10 but is not rejected when the significance level is 0.01.O C. No, the conclusion is not affected by the significance level because H, is rejected regardless of whether a significance level of 0.10 or 0.01 is used.O D. No, the conclusion is not affected by the significance level because H, is not rejected regardless of whether a significance level of 0.10 or 0.01 is used

It is given the time interval between eruptions of a geyser in recent times and 20 years ago times.…

Answered: Listed below are time intervals (min)…

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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A coin-operated drink machine was designed to discharge a mean of 8 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 22 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 8.11 fluid ounces and 0.19 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, μ, differs from 8 fluid ounces? Use the 0.05 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H₁. : (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the p-value. (Round to three or more decimal places.) (e)…
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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 90 78 56 101 61 86 69 87 82 82 55 82 74 102 61 O Past 89 87 93 94 66 86 85 92 86 91 89 91 Let u, be the recent times and let u, be the past times. What are the null and alternative hypotheses? OA. Ho: H1 H2 Calculate the test statistic. (Round to two decimal places as needed.) Find the P-value. P-value: (Round to three decimal places as needed.) %3D Make a conclusion about the null hypothesis and a final conclusion that addresses the original claim. Use a significance level of 0.10. the…
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A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 19 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 5.92 fluid ounces and 0.24 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, μ, differs from 6 fluid ounces? Use the 0.10 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂:0 H₁ :0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three or more decimal…
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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 92 88 80 58 101 61 88 71 88 82 82 56 81 73 102 62 Past 90 88 93 94 64 84
The ages of a group of 149 randomly selected adult females have a standard deviation of 16.5 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let σ=16.5 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statisticsstudents? Assume that we want 90% confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population? Question content area bottom Part 1 The required sample size is enter your response here.
A population has a mean μ = 73 and a standard deviation o = 28. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 257. Hx ox (Simplify your answer.) (Type an integer or decimal rounded 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 condlusion affected by whether the significance level is 0.10 or 0.01? Recent 78 91 90 78 58 100 61 88 70 87 82 83 55 82 75 103 62 - Past 90 89 93 94 63 85 86 92 88 91 90 91 Let p, be the recent times and let u, be the past times. What are the null and alternative hypotheses? OB. H Hy * Hz H PP2 OC. H P
Question [2] A manager at a power company monitored the employee time required to process high efficiency lamp bulb rebates. A random sample of 49 applications gave a sample mean time of 4.0 minutes and a standard deviation of 1.0 minute. Construct a point estimate for the population mean time u to process mean u, and give its 80% error margin.

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