The Kyoto Protocol was signed in 1997, and required countries to start reducing their carbonemissions. The protocol became enforceable in February 2005. The table contains a random sampleof CO2 emissions from different countries. Compute a 98% confidence interval to estimate thepopulation mean CO2 emission.Round final answers to three decimal places.CO2 Emissions (metric tons per capita)0.745.216.695.687.330.74.4918.341.546.773.465.651.647.230.31.657.92.468.356.263.611.032.466.97With% confidence, it can be stated that the true populationmean CO2 emission for all participating countries is betweenmetric tons per capita.

Solution-: We find 98% C.I. for the population mean CO2 emission We prepare the following table:…

Answered: The Kyoto Protocol was signed in 1997,…

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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Each year, Lord & Taylor, Ltd., sets up a gift-wrapping station to assist its customers with holiday shopping. Preliminary observations of one worker at the station producedthe following sample time (in minutes per package): 3.5, 3.2, 4.1,3.6, 3.9. Based on this small sample, what number of observationswould be necessary to determine the true cycle time with a 95%confidence level and an accuracy of {5%?
According to the International Journal of Retail and Distribution Management(Vol. 39, 2011) survey of Black Friday shoppers. One question was “How many hours do you usually spend shopping on Black Friday?” What size sample would be required to estimate the population mean number of hours spent shopping on Black Friday if you want the estimate to be within 0.25 hours at the 95% confidence interval, given a population standard deviation of 1.41hours.
A 90 percent confidence interval is to be created to estimate the proportion of television viewers in a certain areawho favor moving the broadcast of the late weeknight news to an hour earlier than it is currently. Initially, theconfidence interval will be created using a simple random sample of 9,000 viewers in the area. Assuming that thesample proportion does not change, what would be the relationship between the width of the original confidenceinterval and the width of a second 90 percent confidence interval that is created based on a sample of only 1,000viewers in the area?(A) The second confidence interval would be 9 times as wide as the original confidence interval.(B) The second confidence interval would be 3 times as wide as the original confidence interval.(C) The width of the second confidence interval would be equal to the width of the original confidence interval.(D) The second confidence interval would be 1/3 as wide as the original confidence interval.(E) The second…
Suppose that 5000 students who have taken the SAT exam once are randomly assigned to either take an SAT coaching course or not, with the following results in their improvements in SAT scores when they take the exam a second time: Coaching Group Control Group Sample Sample Size Sample Mean Standard Deviation 2500 2500 46.2 44.4 12.3 5.5 Create and interpret a 90% confidence interval for the parameter of interest.
Find the critical value z sub alpha/2 that corresponds to the confidence level 86%
8.3 The Kyoto Protocol was signed in 1997, and required countries to start reducing their carbon emissions. The protocol became enforceable in February 2005. table 8.3.4 contains a random sample of CO2 emissions in 2010 ("CO2 emissions," 2013). Compute a 99% confidence interval to estimate the mean CO2 emission in 2010. Table #8.3.4: CO2 Emissions (metric tons per capita) in 2010 1.36 1.42 5.93 5.36 0.06 9.11 7.32 7.93 6.72 0.78 1.80 0.20 2.27 0.28 5.86 3.46 1.46 0.14 2.62 0.79 7.48 0.86 7.84 2.87 2.45
according to the International Journal of Retail and Distribution Management (Vol. 39, 2011) survey of Black Friday shoppers. One question was “How many hours do you usually spend shopping on Black Friday?” What size sample would be required to estimate the population mean number of hours spent shopping on Black Friday if you want the estimate to be within 0.5 hours at the 99% confidence interval, given a population standard deviation of 2.72 hours m = σ = zα/2 = n =
In order to estimate the mean debt-to-equity ratio of its loan portfolio, the bank randomly selects 12 of its commercial loan accounts. Audits of these twelve companies found the following 12 debt-to-equity ratios. 1.04 1.08 1.13 1.18 1.23 1.32 1.41 1.46 1.55 1.57 1.70 1.77 Note: the sample standard deviation of these 12 ratios is s = 0.245 Determine an appropriate 98% confidence interval for the mean ratio of the bank’s entire portfolio. �¯±�⋅�� Note: σ is unknown, and we have to reply on s. This forces us to use the t-distribution and not the standard normal. Note: Obtain the t-value from the t-distribution excel spreadsheet. We already determined �¯ in part a). When looking up the t-value, what is the appropriate degrees of freedom to use? ["", "", "", ""] What is the appropriate value to use for t? ["", "", "", ""] What is the appropriate CF? ["", "", "", ""] What is the value for n? ["", "", "", ""]
1. statistic practitioner drew a random sample of 400 observations and found that x̅ and . Estimate the population mean with 90% confidence. 2. Repeat part (1) with a 95% confidence level.3. Repeat part (1) with a 99% confidence level.4. What is the effect on the confidence interval estimate of increasing the confidence level?

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