You are investigating insurance fraud that manifests itself through claimants who file claimswith respect to auto accidents with which they were not involved. Your evidence consists of adistribution of the observed number of claimants per accident and a standard distribution foraccidents on which fraud is known to be absent. The two distributions are summarized below:Number of ClaimantsObserved Number ofStandard Probabilityper Accident1Accidents0.252352.353353.242504.111115.04476+.0122Total1.001000Determine the result of a chi-square test of the null hypothesis that there is no fraud in theobserved accidents.

Answered: Image /qna-images/answer/275d9106-1de4-4eed-b34f-4b86107a6495.jpg

Answered: You are investigating insurance fraud…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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You may need to use the appropriate appendix table to answer this question. Suppose that the average price for a gallon of gasoline in the Country A is $3.74 and in Country B it is $3.40. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of $0.25 in the Country A and a standard deviation of $0.20 in Country B. (a) What is the probability that a randomly selected gas station in Country A charges less than $3.50 per gallon? (Round your answer to four decimal places.) (b) What percentage of the gas stations in Country B charge less than $3.50 per gallon? (Round your answer to two decimal places.) (c) What is the probability that a randomly selected gas station in Country B charged more than the mean price in the Country A? (Round your answer to four decimal places.)
Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify no private The ages of 25 are are respectively. Assuming that the distribution of ages is bell shaped, what percentage of the respondents will be between 64.3 and 93.4 years old? 61 89 65 90 69 92 76 70 73 60 67 75 64 82 68 73 66 76 86 74 62 81 63 68 81 approximately 83.9% approximately 60% O approximately 95% O approximately 81.5%
My question for my stats homework comes from the textbook Introduction to the Practice of Statistics Ninth Edition question 4.10.
Cynthia is president of an international chemical distribution company, Cchem. Weekly gross sales for Cchem has a mean of $1 million and standard deviation of $0.2 million; the distribution of sales is highly right-skewed. One week’s sales are independent of the sales in any other week. Use this information to answer questions 5 to 6 below. What is the probability that sales for the week of October 5, 2009 will be more than $1.25 million? In order for Cynthia to receive a bonus, Cchem’s annual sales must exceed $53 million. What is the probability that Cynthia will receive a bonus for the fiscal year starting in 2010? Assume there are 52 weeks in a year.
Residents of certain regions were asked about their thoughts on national defense spending. The results are represented in the table below. Northeast Southeast Midwest West Increase defense spending 169 335 265 359 Keep spending the same 226 278 278 249 Decrease defense spending 210 151 248 115 What is the empirical probability that an individual is from the Northeast, given that they want increased defense spending? Answers should be percentages correct to two decimal places.
It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's law. Here it is: First digit 1 3 4 5 7 8. Proportion 0.301 0.176 0.125 0.097 0.079 0.067 0.058 0.051 0.046 Fake records usually have fewer first digits 1, 2, and 3. What is the approximate probability, if Benford's law holds, that among 1000 randomly chosen invoices there are 565 or fewer amounts with first digit 1, 2, or 3? Give your answer to four decimal places. probability:
Given the following data for an imaginary superhero universe: Flying Telepathy Super Strength Female 19 88 90 Male 96 33 68 Distribution of Super Power by Gender What is the empirical probability that a randomly selected superhero will have telepathy? Answer in decimal form. Round to 3 decimal places as needed
Do you think new package labeling or doing nothing is best? You will want to calculate the percent of bars produced that are within 5 grams of 1000 grams and the percent of bars produced that are within 5 grams of 990 grams. In other words, given a uniform distribution between 980 and 1000, what is the probability of being between 995 and 1005 and what is the probability of being between 985 and 995?
Given the following data for an imaginary superhero universe: Flying Telepathy Super Strength Female 91 15 97 Male 44 74 80 Distribution of Super Power by Gender What is the empirical probability that a randomly selected superhero will have super strength? Answer in decimal form. Round to 3 decimal places as needed Your Answer: Answer
Which of the following distributions would be most likely to have a tail, and why? A. The GPAs of NMSU students, because some students have a 4.0. B. Class scores on a quiz, with 10 points possible, because the most common scores are 7, 8, and 9. C. The time it takes to install a new piece of computer software, because usually it’s quick, but occasionally it takes hours or even days. D. The amount of money you spend each month on food, because food prices change a little from day to day, and sometimes things are on sale.
Body temperature. Suppose the body temperature of healthy individuals is approximately normally distributed with a mean of 37.0°C and a standard deviation of 0.4°C. a. If 130 healthy individuals are randomly selected, what is the probability that the average temperature for these individuals is 36.80°C or lower? b. Would you consider an average temperature of 36.80°C as unlikely to occur if the true average temperature of healthy individuals is 37.0°C?
Residents of certain regions were asked about their thoughts on national defense spending. The results are represented in the table below. Northeast Southeast Midwest West Increase defense spending 466 227 366 239 Keep spending the same 224 344 188 142 Decrease defense spending 409 359 128 173 What is the empirical probability that an individual from the West wants to decrease defense spending? Answers should be percentages correct to two decimal places.

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