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20-8=12
12/2=6
=6...........................................................................................................................................................................
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HW: Statistic questions
1.(25 pts) A researcher wishes to know:Can a child’s health in its first two years of life be enhanced by a program that ...
HW: Statistic questions
1.(25 pts) A researcher wishes to know:Can a child’s health in its first two years of life be enhanced by a program that teaches expectant mothers about nutrition? Identify two independent variables and two dependent variables that would be important to measure.Briefly describe the measure you would use.Identify the level of measurement (nominal ordinal or interval) for each. Example answer Independent variable:Mother’s education level, measured as less than high school, high school graduate, some college, college graduate. Ordinal measure. 2.(25 pts) You are the Dean of students at a college and the President has asked for some information about how the student body has changed over the years.You have collected the following information regarding the number of students in various categories for two different graduating classes: CHARACTERISTICS OF TWO GRADUATING CLASSES 1990 2010 Total in class 345 687 Females 178 301 Attended Commencement 99 458 Finished in 4 years 269 325 Received financial aid 159 369 What will you say to the president when she asks: a.What percentage of the graduating class was female in 1990?________2010?________ b.What proportion of the graduating class attended the commencement ceremony in 2010?______ Has this proportion gone up or down since 1990 and by how much? ______ c.What percent of students received financial aid in 1990?________2010?_______ d.Write a paragraph describing the changes in the graduating classes of 1990 and 2010. What changes seem especially important?Why? 3.(25 pts) Twenty-five people were asked about the television viewing habits. Number of hours spent watching TV per day Frequency 0 2 1 3 2 5 3 7 4 4 6 2 8 1 10 1 Calculate the mean, median and mode for this data.Which measure of central tendency is the most appropriate to use in this case? Why?What percentage scored above a 9.0? 4.(25 pts) In a normal distribution with a mean of 7.8 and a standard deviation of 0.8 Compute a percentile rank for the person with a score of 6.4. What is the score of a person with a percentile rank of 40%
7 pages
Psyc4700week 6 Statistics
Complete the following problems within the Word document. (Do not submit other files.) Show your work for problem sets tha ...
Psyc4700week 6 Statistics
Complete the following problems within the Word document. (Do not submit other files.) Show your work for problem sets that require calculations. ...
8-2 Scenario Analysis: Promotion
InstructionsYou volunteer some of your spare time to your local fire department and have been asked by an assistant chief ...
8-2 Scenario Analysis: Promotion
InstructionsYou volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters who applied for promotion and the results of a chi-square analysis of the data.MaleFemalePromoted1322Not Promoted105Chi-Square Statistic3.6845P value0.054919What factors should the assistant chief consider in determining the presence of gender bias in firefighter promotion?Is the promotional status of recently promoted firefighters independent of their gender?What reasons should the assistant chief convey to the fire chief to justify the absence of gender bias in the most recent class of firefighters who were promoted?How might the presence of gender bias in promotions impact the fire department?Your analysis of the scenario must be submitted as a 1- to 2-page Microsoft Word document with double spacing and 12-point Times
New Roman font.
Concordia Fitting Data Reduction of The Global Poverty Headcount Paper
1. Consult an almanac, newspaper, magazine, or the Internet to find data that appear to lie approximately on or near a str ...
Concordia Fitting Data Reduction of The Global Poverty Headcount Paper
1. Consult an almanac, newspaper, magazine, or the Internet to find data that appear to lie approximately on or near a straight line. A few of the many free sources of data that might be appropriate to use are:http://data.worldbank.org/ (Links to an external site.) (Links to an external site.)http://www.statcrunch.com/5.0/shareddata.php?keywords=DATA (Links to an external site.) (Links to an external site.)http://datacatalogs.org/ (Links to an external site.) (Links to an external site.)http://data.gc.ca/eng (Links to an external site.)2. Create a scatterplot and a line fitting the data in one of two ways:An easier way, and one that produces better looking results, is to find the equation of the line for your data using this free, online linear regression calculator: http://www.alcula.com/calculators/statistics/linear-regression/ (Links to an external site.).b. To use the regression calculator:Enter your data, but without parentheses ( ), in the empty data field at: http://www.alcula.com/calculators/statistics/linear-regression/ (Links to an external site.). For example, for my first point, I would type 1,5 not the usual ordered pair format of (1, 5).When all of your data points are entered, click on the “Submit Data” button. The line of best fit y = mx + b for your data will be displayed, as will a figure showing a scatterplot of your data and the graph of your line of best fit.Right-click on the displayed figure of the scatterplot/graph and save it to your computer. Then, load it into the discussion box when you make your post. To do that, click on the image button in the palette of the discussion text-editor window. In that menu, you load the figure from your computer into your post.3. Also include a link to your data, along with an explanation of what the x and y axes represent in your graph.
The Logic of Inference: The Science of Uncertainty
Describing and explaining social phenomena is a complex task. Box’s quote "All models are wrong. Some models are useful" ...
The Logic of Inference: The Science of Uncertainty
Describing and explaining social phenomena is a complex task. Box’s quote "All models are wrong. Some models are useful" speaks to the point that it is a near impossible undertaking to fully explain such systems—physical or social—using a set of models. Yet even though these models contain some error, the models nevertheless assist with illuminating how the world works and advancing social change.The competent quantitative researcher understands the balance between making statements related to theoretical understanding of relationships and recognizing that our social systems are of such complexity that we will always have some error. The key, for the rigorous researcher, is recognizing and mitigating the error as much as possible.As a consumer of research, you must recognize the error that might be present within your research and the research of others.To prepare for this Discussion select one of the quantitative articles with social change implications attached. As you read the article, reflect on George Box’s quote.Post a brief description (2–3 sentences) of the article you found.Describe how you think the research in the article is useful (e.g., what population is it helping? What problem is it solving?).Using Y=f(X) +E notation, identify the independent and dependent variables.How might the research models presented be wrong? What types of error might be present in the reported research?
discuss whether or not you believe the data indicates an actual or significant reduction in incursions?
19th-century British Prime Minister Benjamin Disraeli is credited with saying "There are three kinds of lies: lies, damned ...
discuss whether or not you believe the data indicates an actual or significant reduction in incursions?
19th-century British Prime Minister Benjamin Disraeli is credited with saying "There are three kinds of lies: lies, damned lies, and statistics." One problem is that data can be misleading if not presented in a clear and sound manner. How many times have you heard that you should stop eating something or start eating something to better your health? Ever wonder what data supports these claims? Wouldn't it be nice to be able to understand if something has significant enough impact to consider including in your life? This module provides you some of the tools needed to better understand data and what they really mean. Let's take a look at a real life, aviation example. The FAA has claimed that runway incursions, an incident when an aircraft or vehicle is on a runway when it is not supposed to be, have been decreasing over the past few years. During this period, the FAA has spent millions of dollars on different systems designed to help reduce these incursions, which the administration claims have been successful in mitigating. Read the FAA Runway Safety Report (Links to an external site.)Links to an external site., with particular attention to page 24. Using what you have learned in the readings, discuss whether or not you believe the data indicates an actual or significant reduction in incursions. What would you recommend to augment the FAA report from a data analysis standpoint? Why do you believe this addition is relevant? https://www.faa.gov/airports/runway_safety/publications/media/Runway-Safety-Report-2013-14.pdf
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HW: Statistic questions
1.(25 pts) A researcher wishes to know:Can a child’s health in its first two years of life be enhanced by a program that ...
HW: Statistic questions
1.(25 pts) A researcher wishes to know:Can a child’s health in its first two years of life be enhanced by a program that teaches expectant mothers about nutrition? Identify two independent variables and two dependent variables that would be important to measure.Briefly describe the measure you would use.Identify the level of measurement (nominal ordinal or interval) for each. Example answer Independent variable:Mother’s education level, measured as less than high school, high school graduate, some college, college graduate. Ordinal measure. 2.(25 pts) You are the Dean of students at a college and the President has asked for some information about how the student body has changed over the years.You have collected the following information regarding the number of students in various categories for two different graduating classes: CHARACTERISTICS OF TWO GRADUATING CLASSES 1990 2010 Total in class 345 687 Females 178 301 Attended Commencement 99 458 Finished in 4 years 269 325 Received financial aid 159 369 What will you say to the president when she asks: a.What percentage of the graduating class was female in 1990?________2010?________ b.What proportion of the graduating class attended the commencement ceremony in 2010?______ Has this proportion gone up or down since 1990 and by how much? ______ c.What percent of students received financial aid in 1990?________2010?_______ d.Write a paragraph describing the changes in the graduating classes of 1990 and 2010. What changes seem especially important?Why? 3.(25 pts) Twenty-five people were asked about the television viewing habits. Number of hours spent watching TV per day Frequency 0 2 1 3 2 5 3 7 4 4 6 2 8 1 10 1 Calculate the mean, median and mode for this data.Which measure of central tendency is the most appropriate to use in this case? Why?What percentage scored above a 9.0? 4.(25 pts) In a normal distribution with a mean of 7.8 and a standard deviation of 0.8 Compute a percentile rank for the person with a score of 6.4. What is the score of a person with a percentile rank of 40%
7 pages
Psyc4700week 6 Statistics
Complete the following problems within the Word document. (Do not submit other files.) Show your work for problem sets tha ...
Psyc4700week 6 Statistics
Complete the following problems within the Word document. (Do not submit other files.) Show your work for problem sets that require calculations. ...
8-2 Scenario Analysis: Promotion
InstructionsYou volunteer some of your spare time to your local fire department and have been asked by an assistant chief ...
8-2 Scenario Analysis: Promotion
InstructionsYou volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters who applied for promotion and the results of a chi-square analysis of the data.MaleFemalePromoted1322Not Promoted105Chi-Square Statistic3.6845P value0.054919What factors should the assistant chief consider in determining the presence of gender bias in firefighter promotion?Is the promotional status of recently promoted firefighters independent of their gender?What reasons should the assistant chief convey to the fire chief to justify the absence of gender bias in the most recent class of firefighters who were promoted?How might the presence of gender bias in promotions impact the fire department?Your analysis of the scenario must be submitted as a 1- to 2-page Microsoft Word document with double spacing and 12-point Times
New Roman font.
Concordia Fitting Data Reduction of The Global Poverty Headcount Paper
1. Consult an almanac, newspaper, magazine, or the Internet to find data that appear to lie approximately on or near a str ...
Concordia Fitting Data Reduction of The Global Poverty Headcount Paper
1. Consult an almanac, newspaper, magazine, or the Internet to find data that appear to lie approximately on or near a straight line. A few of the many free sources of data that might be appropriate to use are:http://data.worldbank.org/ (Links to an external site.) (Links to an external site.)http://www.statcrunch.com/5.0/shareddata.php?keywords=DATA (Links to an external site.) (Links to an external site.)http://datacatalogs.org/ (Links to an external site.) (Links to an external site.)http://data.gc.ca/eng (Links to an external site.)2. Create a scatterplot and a line fitting the data in one of two ways:An easier way, and one that produces better looking results, is to find the equation of the line for your data using this free, online linear regression calculator: http://www.alcula.com/calculators/statistics/linear-regression/ (Links to an external site.).b. To use the regression calculator:Enter your data, but without parentheses ( ), in the empty data field at: http://www.alcula.com/calculators/statistics/linear-regression/ (Links to an external site.). For example, for my first point, I would type 1,5 not the usual ordered pair format of (1, 5).When all of your data points are entered, click on the “Submit Data” button. The line of best fit y = mx + b for your data will be displayed, as will a figure showing a scatterplot of your data and the graph of your line of best fit.Right-click on the displayed figure of the scatterplot/graph and save it to your computer. Then, load it into the discussion box when you make your post. To do that, click on the image button in the palette of the discussion text-editor window. In that menu, you load the figure from your computer into your post.3. Also include a link to your data, along with an explanation of what the x and y axes represent in your graph.
The Logic of Inference: The Science of Uncertainty
Describing and explaining social phenomena is a complex task. Box’s quote "All models are wrong. Some models are useful" ...
The Logic of Inference: The Science of Uncertainty
Describing and explaining social phenomena is a complex task. Box’s quote "All models are wrong. Some models are useful" speaks to the point that it is a near impossible undertaking to fully explain such systems—physical or social—using a set of models. Yet even though these models contain some error, the models nevertheless assist with illuminating how the world works and advancing social change.The competent quantitative researcher understands the balance between making statements related to theoretical understanding of relationships and recognizing that our social systems are of such complexity that we will always have some error. The key, for the rigorous researcher, is recognizing and mitigating the error as much as possible.As a consumer of research, you must recognize the error that might be present within your research and the research of others.To prepare for this Discussion select one of the quantitative articles with social change implications attached. As you read the article, reflect on George Box’s quote.Post a brief description (2–3 sentences) of the article you found.Describe how you think the research in the article is useful (e.g., what population is it helping? What problem is it solving?).Using Y=f(X) +E notation, identify the independent and dependent variables.How might the research models presented be wrong? What types of error might be present in the reported research?
discuss whether or not you believe the data indicates an actual or significant reduction in incursions?
19th-century British Prime Minister Benjamin Disraeli is credited with saying "There are three kinds of lies: lies, damned ...
discuss whether or not you believe the data indicates an actual or significant reduction in incursions?
19th-century British Prime Minister Benjamin Disraeli is credited with saying "There are three kinds of lies: lies, damned lies, and statistics." One problem is that data can be misleading if not presented in a clear and sound manner. How many times have you heard that you should stop eating something or start eating something to better your health? Ever wonder what data supports these claims? Wouldn't it be nice to be able to understand if something has significant enough impact to consider including in your life? This module provides you some of the tools needed to better understand data and what they really mean. Let's take a look at a real life, aviation example. The FAA has claimed that runway incursions, an incident when an aircraft or vehicle is on a runway when it is not supposed to be, have been decreasing over the past few years. During this period, the FAA has spent millions of dollars on different systems designed to help reduce these incursions, which the administration claims have been successful in mitigating. Read the FAA Runway Safety Report (Links to an external site.)Links to an external site., with particular attention to page 24. Using what you have learned in the readings, discuss whether or not you believe the data indicates an actual or significant reduction in incursions. What would you recommend to augment the FAA report from a data analysis standpoint? Why do you believe this addition is relevant? https://www.faa.gov/airports/runway_safety/publications/media/Runway-Safety-Report-2013-14.pdf
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