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 3% during the current year. In addition, it estimatesthat 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)?%

Probability of an event is the percentage of chances that the event will occur. The probability lies…

Answered: A company studied the number of…

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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Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 51 stocks traded on the NYSE that day showed that 8 went up.You are conducting a study to see if the proportion of stocks that went up is significantly less than 0.3. You use a significance level of α=0.001α=0.001.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... This test statistic leads to a decision to... As such, the final conclusion is that...
Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 78 stocks traded on the NYSE that day showed that 26 went up.You are conducting a study to see if the proportion of stocks that went up is significantly more than 0.3. You use a significance level of α=0.01What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) α greater than α This test statistic leads to a decision to... reject the null accept the null fail to reject…
A health statistics agency in a certain country tracks the number of adults who have health insurance. Suppose according to the agency, the uninsured rates in a recent year are as follows: 5.2% of those under the age of 18, 12.7% of those ages 18-64, and 1.3% of those 65 and older do not have health insurance. Suppose 22.4% of people in the county are under age 18, and 61.9 % are ages 18-64. (a) What is the probability that a randomly selected person in this country is 65 or older? 157 (b) Given that a person in this country is uninsured, what is the probability that the person is 65 or older? (Round your answer to three decimal places.) x Submit Answer
1.
11. In a nursing home, a program is launched in 2005 to asses the extent to which it’s residents are affected by diabetes. Each residents are affected by diabetes. Each resident has a blood test, and 48 of the 625 residents have diabetes in 2005. Residents who did not already have diabetes were again tested in 2010, and 57 residents had diabetes. a. What is the prevalence of diabetes in 2005? b. What is the cumulative incidence of diabetes over 5 years? c. What is the prevalence of diabetes in 2010 (assume that none of the residents in 2005 have died or left the nursing home)?
A study about 256,200 healthy people. Over the next 3 years, 4,567 develop the disease. What is the incidence? A. 18.1 B. 16.5 C. 17.8 D.17.6
TIMELINE OR LINE GRAPH The Timeline Graphs necessary for this exercise are also in Public Files/Mod1 A timeline or line graph shows trends over time. This study examines whether there is any relationship between the season of the year and suicide rates. These two line graphs show rates per 100,000.This study was based on data from Hong Kong only for the years 1980 to 1994. Line Graph images 1.5 1.0 Figure 1. Average total and sex-specific monthly suicide rates, 1980-1994. (I Total, • Male, A Female) 0.5 0.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Suicides per 100,000
1. An AP Statistics class starts a project to estimate the average number of hours a student at their high school sleeps per night. Their high school has 1200 students, and they take a sample of the first 120 students that arrive at school on a particular day. They ask each of the 120 students how many hours of sleep they got the night before and then calculate an average. Which of the following statements is an accurate description of the elements of this survey? (A) Population: the 120 students surveyed. Parameter of interest: the average number of hours a student at this high school sleeps per night. (B) Sample: the 1200 students of the school. Population: all high school students in the United States. Statistic: the average number of hours a student at this high school sleeps per night. (C) Sample: the 120 students surveyed. Population: the 1200 students at the high school. Parameter of interest: the average number of hours a student at this high school sleeps per night. (D)…
24. On-Time Arrivals. The Air Travel Consumer Report is a monthly product of the Department of Transportation's Office of Avi- ation Enforcement and Proceedings. The report is designed to assist consumers with information on the quality of services provided by the airlines. Following are the percentages of on-time arrivals for June 2013 by the 16 reporting airlines. 93.1 87.5 77.9 77.3 76.1 73.8 73.0 72.5 71.1 70.6 69.8 69.6 69.0 66.0 65.9 61.8 a. Identify the classes for grouping these data, using cutpoint group- ing with classes of equal width 5 and a first lower class cutpoint of 60. b. Identify the class midpoints of the classes found in part (a). c. Construct frequency and relative-frequency distributions of the data based on your classes from part (a). d. Draw a frequency histogram of the data based on your classes from part (a). e. Round each observation to the nearest whole number, and then construct a stem-and-leaf diagram with two lines per stem. f. Obtain the greatest…
Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 70 stocks traded on the NYSE that day showed that 8 went up.You are conducting a study to see if the proportion of stocks that went up is is significantly less than 0.3. You use a significance level of α=0.005α=0.005.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This test statistic leads to a decision to... reject the null accept the null…
A health statistics agency in a certain country tracks the number of adults who have health insurance. Suppose according to the agency, the uninsured rates in a recent year are as follows: 5.2% of those under the age of 18, 12.9% of those ages 18-64, and 1.3% of those 65 and older do not have health insurance. Suppose 22.4% of people in the county are under age 18, and 62.3% are ages 18-64. (a) What is the probability that a randomly selected person in this country is 65 or older? 15.3 (b) Given that a person in this country is uninsured, what is the probability that the person is 65 or older? (Round your answer to three decimal places.) 0.023 X
Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day.A sample of 50 stocks traded on the NYSE that day showed that 12 went up.You are conducting a study to see if the proportion of stocks that went up is significantly less than 0.3. You use a significance level of α=0.01.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = The p-value is... less than (or equal to) αα greater than αα This test statistic leads to a decision to... reject the null accept the null fail to…

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