3.9 A community in the San Francisco Bay area consists of approximately 50,000persons, of whom approximately 40% are Caucasians, 25% are AfricanAmerican, 20% are Hispanic, and 15% are Asian. It is desired to estimate inthis community the proportion of persons who are not covered by some formof health insurance. One would like to be 95% certain that this estimate iswithin 15% of the true proportion, which is believed to lie somewhere be-tween 10% and 20% of the total population. Assuming simple random sam-pling, how large a sample is needed?

Answered: Image /qna-images/answer/91c495e4-cc3d-44b7-8aef-e907fcdc8dda.jpg

Answered: 3.9 A community in the San Francisco…

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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Preferred Investment Instrument Survey A survey of a random sample of 450 workers asked them to identify their preferred investment instrument for retirement saving products. a. Company pension fund b. Retirement annuity С. Unit trust linked funds d. Properties е. National lottery The survey found that 58% selected a company pension fund, 22% chose the retirement annuity, 10% chose unit trust linked funds, while 8% believed properties were the best option and the remainder selected the national lottery as the way to save for retirement. The aim of the study is to describe the opinions of all workers' views in South Africa. The survey also collected the saving values of the 450 workers and complied the following numeric frequency distribution table: Saving Values Frequency R 500 to less than R1 000 120 R1 000 to less than R1 500 98 R1 500 to less than R 2 000 180 R2 000 to less than R2 500 32 R2 500 to less than R3 000 20 Source: Lai, K. (2020)
An insurance company offers four different deductible levels-none, low, medium, and high-for its homeowner's policyholders and three different levels-low, medium, and high-for its automobile policyholders. The accompanying table gives proportions for the various categories of policyholders who have both types of insurance. For example, the proportion of individuals with both low homeowner's deductible and low auto deductible is 0.05 (5% of all such individuals). Auto L M H Homeowner's N L M H 0.04 0.05 0.05 0.02 0.07 0.12 0.20 0.10 0.02 0.03 0.15 0.15 Suppose an individual having both types of policies is randomly selected. (a) What is the probability that the individual has a medium auto deductible and a high homeowner's deductible? (b) What is the probability that the individual has a low auto deductible? A low homeowner's deductible? auto deductible homeowner's deductible (c) What is the probability that the individual is in the same category for both auto and homeowner's…
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Pictured Below
An Associated Press story in Easton, Maryland’s The Star Democrat on June 3, 2010 reported thatAll told, scam artists are believed to have stolen about $47 billion from Medicare in the 2009 fiscal year, nearly triple the toll a year earlier. Medicare spokesman Peter Ashkanaz said that…charges have been filed against 103 defendants in cases involving more than $100 million in Medicare fraud.(a) What percentage of the Medicare fraud has been targeted by filed charges?(b) What is the average claim in each fraud charge?(c) How many of these average size claims would need to be filed to recover the entire $47 billion?
1. How does the cost of shipping a standard-sized crate relate to the distance of the destination? Can the cost of shipping be determined using the distance of the destination? To answer these questions, a Philippine Airlines statistician used 12 freight invoices randomly drawn and summarized below. Distance Charge (in pesos) (hundred of kilometers) 1400 2000 800 1600 1620 1900 620 1440 900 1800 2100 750 14 23 9 17 10 22 5 12 6 16 25 8 (n Plot the residual scatter diagram for the data.

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