In 1993 approximately 62.1 million Americans suffered injuries, as reported by the National Center for Health Statistics in Vital and Health Statistics. More males (33.4million) were injured than females (28.7 million). Those statistics do not tell us whether males and females tend to be injured in similar circumstances. One set ofcategories commonly used for accident circumstances. One set of categories commonly used for accident circumstance is "while at work," "home", "motor vehicle",and "other". A random sample of accident reports gave the data in contingency table below.MaleFemaleWhile at work192427Home14Motor Vehicle26OtherAt the 5% significance level, do the data provide sufficient evidence to conclude that an association exists between accident circumstances and sex?Type in Canvas the grand total.35

Given: Male Female Total While at work 19 5 24 Home 24 27 51 Motor vehicle 4 7 11 Other…

Answered: In 1993 approximately 62.1 million…

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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Would observations or interviews be more appropriate to research the following topic?How politicians define family values.O ObservationsO Interviews
Age and Gender. The U.S. Census Bureau publishes census data on the resident population of the United States in Current Population Survey. According to that document, 7.3% of male residents are in the age group 20–24 years. a. If no association exists between age group and gender, what percentage of the resident population would be in the age group 20–24 years? Explain your answer.b. If no association exists between age group and gender, what percentage of female residents would be in the age group 20–24 years? Explain your answer.c. There are about 158 million female residents of the United States. If no association exists between age group and gender, how many female residents would there be in the age group 20–24 years?d. In fact, there are some 10.9 million female residents in the age group 20–24 years. Given this number and your answer to part (c), what do you conclude?
A congressperson wants to come up with a single value to describe the prices of homes in their district. However, their district consists of a few homes that are extremely expensive compared to the others. Which descriptive statistic should they use? a. Range b. Mode c. Median d. Mean
The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics, and any disabilities or special educational needs the student may have. Which of the following are categorical (or qualitative) variables in these records? Days Absent Age Race or Ethnicity Disabilities or Special Needs O Reading Test Score Current Grade Level (A/B/C/D/F) Mathematics Test Score
You are responsible for a data analysis exercise in your first job (as a data analyst) after graduating and have downloaded some associated reports. Your first task requires you to write a data dictionary and determine what type of variable the data you are dealing with relates to. Which of the following are categorical variables? Select one: a. The number of marks out of 10 that an employee obtained on the company’s information technology training. b. The number of employees in each division c. The number of years of service of each employee. d. The employee’s tax file number. e. The pro-rata income for all employees within the business/finance division.
17. Answer the following questions for two stat classes. Test Scores for Class A 99; 56; 78; 55; 32; 90; 80; 81; 56; 59; 45; 77; 85; 84; 70; 72; 68; 32; 79; 90 Test Scores for Class B 99; 78; 68; 83; 81; 89; 88; 76; 65; 45; 98; 90; 80; 85; 84; 79; 78; 98; 90; 79; 81; 324 a. Create a box plot for each set of data. Use one number line for both box plots. b. Which box plot has the widest spread for the middle 50% of the data (the data between the first and third quartiles)? What does this mean for that set of data in comparison to the other set of data?
Consider the following 10 exam scores: 28, 57, 58, 64, 69, 74, 79, 80, 83, and 85 what is the mode?
3. Consider a data set for which the "individuals" are restaurants in King County, Washington. a. Create a categorical variable that could be used to describe an individual restaurant in this data set. b. Create a quantitative variable that could be used to describe an individual restaurant in this data set and clearly state what units your variable would have.
Assume that 135 surveys are completed. Of those surveyed, 61 responded positively to effectiveness, 65 responded positively to side effects, and 63 responded positively to cost. Also, 26 responded positively to both effectiveness and side effects, 29 to effectiveness and cost, 26 to side effects and cost, and 16 to none of the items. How many responded positively to all three?

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