A government official is in charge of allocating social programs throughout the city of Vancouver. He will decide where these social outreach programsshoulde located based on the percentage of residents living below the poverty line in each region of the city. He takes a simple random sample of 130people living in Gastown and finds that 21 have an annual income that is below the poverty line.Part i) The proportion of the 130 people who are living below the poverty line, 21/130, is a:A. parameter.B. statistic.C. variable of interest.Part ii) Use the sample data to compute a 95% confidence interval for the true proportion of Gastown residents living below the poverty line.(Please carry answers to at least six decimal places in intermediate steps. Give your final answer to the nearest three decimal places).0095% confidence interval=

Answered: A government official is in charge of…

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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Among the first-year resident students, eight students were randomly selected, and their body weights were measured at the beginning and the end of the semester. The data obtained are as follows. Whether the table can be considered to be below the significant level of 5%, the first-year freshman is living on campus because of the reasons. Is there a significant difference in average body weight?
John Calipari, head basketball coach for the 2012 national champion University of Kentucky Wildcats, is the highest paid coach in college basketball with an annual salary of $5.4 million (USA Today, March 29, 2012). The sample below shows the head basketball coach's salary for a sample of 10 schools playing NCAA Division 1 basketball. Salary data are in millions of dollars. University Coach’s Salary University Coach’s Salary Indiana 2.2 Syracuse 1.5 Xavier .5 Murray State .2 Texas 2.4 Florida State 1.5 Connecticut 2.7 South Dakota State .1 West Virginia 2.0 Vermont .2 a. Use the sample mean for the 10 schools to estimate the population mean annual salary for head basketball coaches at colleges and universities playing NCAA Division 1 basketball (to 2 decimals). b. Use the data to estimate the population standard deviation for the annual salary for head basketball coaches (to 4 decimals).
During an examination of equal length of cloths, the following are the number of defects observed: 2. 3, 4, 0, 5, 6, 7, 4, 3, 2 Draw a control chart for the number of defects and comment whether the process is under control or not.
In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests." The article says that the overall statewide proportion of school buses that fail safety tests is 9%. However, one bus companyhas a higher rate of over 12%. Assume that we want a new estimate for the statewide proportion of school buses that fail the safety inspection. We take a sample of 200 buses and find that 20 buses fail the safety inspection. What is the sample proportion of buses that fail the test? (Enter your answer as a decimal fraction between 0 and 1, e.g. .27)
A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant. Historical records show that 6% of the employees suffered lost-time accidents last year. Management believes that a special safety program will reduce such accidents to 4% during the current year. In addition, it estimates that 15% of employees who had lost-time accidents last year will experience a lost-time accident during the current year. a. What percentage of the employees will experience lost-time accidents in both years (to 2 decimals)? % b. What percentage of the employees will suffer at least one lost-time accident over the two-year period (to 2 decimals)? %
The National Association of Home Builders provided data on the cost of the most popular home remodeling projects. Sample data on cost in thousands of dollars for two types of remodeling projects are as follows. Excel File: data10-41.xlsx Kitchen Master Bedroom Kitchen Master Bedroom 25.2 18.0 23.0 17.8 17.4 22.9 19.7 24.6 22.8 26.4 16.9 21.0 21.9 24.8 21.8 19.7 26.9 23.6 a. Develop a point estimate of the difference between the population mean remodeling costs of kitchens and master bedrooms. (Enter negative values as negative numbers. Report in thousands of dollars with no commas in your answer.) Point estimate $ thousand b. Develop a 90% confidence interval for the difference between the two population means. (to 1 decimal and enter negative values as negative numbers) ) in thousands of dollars.
During 2001, Campbell Soup Foundation provided the following amounts in grants: Camden, NJ., $1,336,700; Plant Communities, $341,500; Dollars for Doers, $179,600; Other Projects, $64,100. Construct a bar chart to summarize these contributions Construct a pie chart to summarize these contributions Why is it appropriate to construct a bar for this data instead of a histogram?
Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of the severity of the storm and the type of residential construction used in this semitropical area, there was some concern that the average claim size would be greater than the historical average hurricane claim of $26,000. Several insurance companies collaborated in a data gathering experiment. They randomly selected 24 homes and sent adjusters to settle the claims. In the sample of 24 homes, the average claim was $28,500 with a population standard deviation of $5200. Is there sufficient evidence at a 0.02 significance level to support the claim that the home damage is greater than the historical average? Assume the population of insurance claims is approximately normally distributed. Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho 26,000 Hoμ Ha H = 26,000
An article describes a study in which a new type of ointment was applied to forearms of volunteers to study the rates of absorption into the skin. Eight locations on the forearm were designated for ointment application. The new ointment was applied to six locations, and a control was applied to the other two. How many different choices were there for the six locations to apply the new ointment?
As chairperson of the Rogers County Task Force on Aging, you wish to estimate the proportion of senior citizens in the region who would use a mobile medical check-up program if such a service was implemented. A random sample of 44 senior citizens was polled and it was found that 22 would use such a service. a. Let p represent the proportion of all senior citizens in the region who would utilize the mobile medical check-up program. Find a point estimate for p. (Round result to 3 decimal places.) b. Find a 95% confidence interval for p. (Round results to 3 decimal places.) ? ♥ < c. The Rogers County Director tasks you with doing a larger study, to develop a more precise estimate. The director would like an estimate for the proportion of retired people who would use the mobile medical check-up program that is within 5% of the population percentage, with 95% confidence. Using the original study (described above) as a preliminary estimate for the population proportion p, what is the minimum…
The Fish and Game Deparment stocked Lake Loomis with fish according to the following percentages: 10% catfish, 30% bass, 40% bluegill, and 20% pike. Five years later, they sampled the lake to see if the distribution of fish had changed. Of the 500 fish in their sample, 62 were catfish, 108 were bass, 204 were bluegill, and 126 were pike. Use a Chi-Squared test to determine whether the distribution of fish in Lake Loomis had changed significantly over this five-year period. Based on the result, what conclusion should the Fish and Game Department reach? No excel, please.

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