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Probability In Managerial Decision Making
After reading the case, I realized how important managerial skills are in Goodyear's management and leadership, particular ...
Probability In Managerial Decision Making
After reading the case, I realized how important managerial skills are in Goodyear's management and leadership, particularly managerial decision ...
University of Nairobi ANOVA F Test For the Eye Color and CF Question
ContextCritical flicker frequency (CFF) and eye colorComputer screens and fluorescent bulbs flicker. If the frequency of t ...
University of Nairobi ANOVA F Test For the Eye Color and CF Question
ContextCritical flicker frequency (CFF) and eye colorComputer screens and fluorescent bulbs flicker. If the frequency of the flicker is below a certain threshold, the eye detects the flicker, and it is annoying!Different people have different flicker "threshold" frequencies (known as the critical flicker frequency, or CFF). The mean critical threshold frequency is important for product manufacturing as well as tests for ocular disease.In 1973, researchers conducted a study to answer the following question.Research question: Do people with different eye color have different threshold flicker sensitivity?The 1973 study ("The Effect of Iris Color on Critical Flicker Frequency," Journal of General Psychology [1973], 91–95) obtained the following data from a random sample of 19 subjects.ColorThresholdFrequency (CFF)BlueBrownGreen Brown 26.825.726.826.4 Brown 27.927.227.924.2 Brown 23.729.923.728 Brown 25.028.52526.9 Brown 26.329.426.329.1 Brown 24.828.324.8 Brown 25.725.7 Brown 24.524.5 Green 26.4 Green 24.2 Green 28.0 Green 26.9 Green 29.1 Blue 25.7 Blue 27.2 Blue 29.9 Blue 28.5 Blue 29.4 Blue 28.3In this spreadsheet the data is presented in two formats.Stacked data: The quantitative data is stacked in one column. The first two columns show the data in a stacked format. Each variable is a column (one column for the explanatory variable eye color; one column for the response variable CFF) and each row is an individual. For example, the first row is a brown-eyed person with a CFF of 26.8.Unstacked data: The quantitative data is distributed across the groups in multiple columns. The last three columns show the same data in an unstacked format. In this format, each column is a group defined by a value of the explanatory variable: one column for blue-eyed people, one column for brown-eyed people and one column for green-eyed people. Each column contains the response values (CFF) for that group.The format of the data in the spreadsheet affects how we use StatCrunch to analyze it.VariablesColor: This is the explanatory variable. The categorical data represents the groups we will compare.CFF (flicker threshold sensitivity): This is the response variable. The quantitative data represents the frequency threshold at which the subject sees the flicker.Datahttps://www.statcrunch.com/app/?dataid=3748367&tok... use this link for the data!!!!!PromptWe will conduct an ANOVA F-test for the variables Color and CFF. The flicker datafile is available in the Data section below. Also, the StatCrunch directions are provided in the list a the bottom of this page.What are the hypotheses for the ANOVA test? Be sure that you define clearly the parameters.Are the conditions that allow us to safely use the ANOVA F-test met? Explain.Note: To verify conditions, you will need to examine the distribution of CFF scores for each sample (because the samples are small).Use StatCrunch to create side-by-side dotplots, histograms or boxplots (your choice) to examine the distribution of CFF scores for each sample. You can use either data format; choose one (stacked data in the first two columns; or unstacked data in the the last three columns). To create the side-by-side graphs (for either data format) see the list of StatCrunch directions below. Download the StatCrunch output window (your graph), upload it to your Stats-Class folder, and then embed the .png file (your graph) in your initial post. To recall how to complete these tasks, see the list of StatCrunch directions below.You will also need to compare the sample standard deviations. Use StatCrunch to find the summary statistics, means and standard deviations for the comparison groups (select the the appropriate Descriptive Statistics StatCrunch directions from the list below). Then copy and paste the table into your initial post and explain how the rule of thumb for comparing standard deviations is met.Use StatCrunch to carry out the ANOVA F-test (select the appropriate ANOVA StatCrunch directions from the following two options). Anova F-test Stacked Data Format ORAnova F-test Unstacked Data FormatCopy and paste the output table into your initial post.State your conclusion in context of eye color and mean CFF.
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Mr. and Mrs. Kentcontacted us (the financial advice firm you work for) because they need some help with investing in fixed income. They own their own house; they already have equity investments, and they are considering investing$300,000 in fixed income. They tell us that they are interested in an investing horizon of about 20 years. We must respondto thesequestions:1.A) What are the fixed income investments we should consider? (Hint: Simply write their names in a list.)B) What do you recommend for us among CDs, treasuries, and corporate bonds? (Hint: discuss yields foreachwith, for example, the information available at vanguard.com.)2.A) Find a suitablecorporate bond at vanguard.com–highest possible grade, not callable, not convertible, about 20 years maturity.B) Prepare a table of cash flows for the bond you have selected, and the Kent’s $300,000 investing budget. (Note: picture-example given in the cash-flows tab in the file “teaching-f20-fixed-income-annotated-2.xlsx”.In order to best learn, you must do this by yourself.) 3.A) Are annual cash-flows over $15,000for the bond investment you have selected? (Hint: simply answer Yes, or No.)B) What could we do if the cash flows were less than $15,000 per year?(Hint: remember the classroom discussion about possible bond portfolio management strategies for the Kents.)4.How does acorporate bond investment compare with investing in bond mutual funds? (Find a corporate bond mutual funds at vanguard.com, or at any other site you may find). 5.What about immediate annuities? Should we use the single corporate bond or the insurance annuities? We are both 65 years old. (Hint: go to immediateannuities.com, input our data, copy & paste the data in your report, and briefly explain the relevant numbers.)
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Formulate and evaluate hypothesis tests for population parameters based on sample statistics using both Critical Regions and P-Values, and be able to state results in a non-technical way that can be understood by consumers of the data instead of statisticians.Student ProfileYou are a statistician working for a drug company. A few new scientists have been hired by your company. They are experts in pharmacology, but are not experts in doing statistical studies, so you will explain to them how statistical studies are done when testing two samples for the effectiveness of a new drug. The two samples can be dependent or independent, and you will explain the difference.Concept being StudiedYour focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.What to SubmitYour research and analysis should be presented on the Word document (attached) provided. All calculations should be provided on a separate Excel workbook (you must provide yourself) that should be submitted to your boss as well.YOU MUST MEET THE BELOW REQUIREMENTS: All problems are solved correctly. Complete and detailed steps are provided to explain how to solve the problem. Explanations demonstrate a mastery of understanding of the statistical concepts and terminology. All variables, equations, and expressions are properly formatted.
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Most Popular Content
4 pages
Probability In Managerial Decision Making
After reading the case, I realized how important managerial skills are in Goodyear's management and leadership, particular ...
Probability In Managerial Decision Making
After reading the case, I realized how important managerial skills are in Goodyear's management and leadership, particularly managerial decision ...
University of Nairobi ANOVA F Test For the Eye Color and CF Question
ContextCritical flicker frequency (CFF) and eye colorComputer screens and fluorescent bulbs flicker. If the frequency of t ...
University of Nairobi ANOVA F Test For the Eye Color and CF Question
ContextCritical flicker frequency (CFF) and eye colorComputer screens and fluorescent bulbs flicker. If the frequency of the flicker is below a certain threshold, the eye detects the flicker, and it is annoying!Different people have different flicker "threshold" frequencies (known as the critical flicker frequency, or CFF). The mean critical threshold frequency is important for product manufacturing as well as tests for ocular disease.In 1973, researchers conducted a study to answer the following question.Research question: Do people with different eye color have different threshold flicker sensitivity?The 1973 study ("The Effect of Iris Color on Critical Flicker Frequency," Journal of General Psychology [1973], 91–95) obtained the following data from a random sample of 19 subjects.ColorThresholdFrequency (CFF)BlueBrownGreen Brown 26.825.726.826.4 Brown 27.927.227.924.2 Brown 23.729.923.728 Brown 25.028.52526.9 Brown 26.329.426.329.1 Brown 24.828.324.8 Brown 25.725.7 Brown 24.524.5 Green 26.4 Green 24.2 Green 28.0 Green 26.9 Green 29.1 Blue 25.7 Blue 27.2 Blue 29.9 Blue 28.5 Blue 29.4 Blue 28.3In this spreadsheet the data is presented in two formats.Stacked data: The quantitative data is stacked in one column. The first two columns show the data in a stacked format. Each variable is a column (one column for the explanatory variable eye color; one column for the response variable CFF) and each row is an individual. For example, the first row is a brown-eyed person with a CFF of 26.8.Unstacked data: The quantitative data is distributed across the groups in multiple columns. The last three columns show the same data in an unstacked format. In this format, each column is a group defined by a value of the explanatory variable: one column for blue-eyed people, one column for brown-eyed people and one column for green-eyed people. Each column contains the response values (CFF) for that group.The format of the data in the spreadsheet affects how we use StatCrunch to analyze it.VariablesColor: This is the explanatory variable. The categorical data represents the groups we will compare.CFF (flicker threshold sensitivity): This is the response variable. The quantitative data represents the frequency threshold at which the subject sees the flicker.Datahttps://www.statcrunch.com/app/?dataid=3748367&tok... use this link for the data!!!!!PromptWe will conduct an ANOVA F-test for the variables Color and CFF. The flicker datafile is available in the Data section below. Also, the StatCrunch directions are provided in the list a the bottom of this page.What are the hypotheses for the ANOVA test? Be sure that you define clearly the parameters.Are the conditions that allow us to safely use the ANOVA F-test met? Explain.Note: To verify conditions, you will need to examine the distribution of CFF scores for each sample (because the samples are small).Use StatCrunch to create side-by-side dotplots, histograms or boxplots (your choice) to examine the distribution of CFF scores for each sample. You can use either data format; choose one (stacked data in the first two columns; or unstacked data in the the last three columns). To create the side-by-side graphs (for either data format) see the list of StatCrunch directions below. Download the StatCrunch output window (your graph), upload it to your Stats-Class folder, and then embed the .png file (your graph) in your initial post. To recall how to complete these tasks, see the list of StatCrunch directions below.You will also need to compare the sample standard deviations. Use StatCrunch to find the summary statistics, means and standard deviations for the comparison groups (select the the appropriate Descriptive Statistics StatCrunch directions from the list below). Then copy and paste the table into your initial post and explain how the rule of thumb for comparing standard deviations is met.Use StatCrunch to carry out the ANOVA F-test (select the appropriate ANOVA StatCrunch directions from the following two options). Anova F-test Stacked Data Format ORAnova F-test Unstacked Data FormatCopy and paste the output table into your initial post.State your conclusion in context of eye color and mean CFF.
11 pages
Susan O'Connell multiple step problem solving posters
Poster for each strategy for math problem solving as proposed by Susan O'Connell's problem solving strategies textbook. Th ...
Susan O'Connell multiple step problem solving posters
Poster for each strategy for math problem solving as proposed by Susan O'Connell's problem solving strategies textbook. They are ideal to put all over the classroom and to teach individually.
4 pages
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country mo ...
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country more specifically in Equateur ...
University of South Florida Mr and Mrs Kent Investment Analysis Excel Sheet
Mr. and Mrs. Kentcontacted us (the financial advice firm you work for) because they need some help with investing in fixed ...
University of South Florida Mr and Mrs Kent Investment Analysis Excel Sheet
Mr. and Mrs. Kentcontacted us (the financial advice firm you work for) because they need some help with investing in fixed income. They own their own house; they already have equity investments, and they are considering investing$300,000 in fixed income. They tell us that they are interested in an investing horizon of about 20 years. We must respondto thesequestions:1.A) What are the fixed income investments we should consider? (Hint: Simply write their names in a list.)B) What do you recommend for us among CDs, treasuries, and corporate bonds? (Hint: discuss yields foreachwith, for example, the information available at vanguard.com.)2.A) Find a suitablecorporate bond at vanguard.com–highest possible grade, not callable, not convertible, about 20 years maturity.B) Prepare a table of cash flows for the bond you have selected, and the Kent’s $300,000 investing budget. (Note: picture-example given in the cash-flows tab in the file “teaching-f20-fixed-income-annotated-2.xlsx”.In order to best learn, you must do this by yourself.) 3.A) Are annual cash-flows over $15,000for the bond investment you have selected? (Hint: simply answer Yes, or No.)B) What could we do if the cash flows were less than $15,000 per year?(Hint: remember the classroom discussion about possible bond portfolio management strategies for the Kents.)4.How does acorporate bond investment compare with investing in bond mutual funds? (Find a corporate bond mutual funds at vanguard.com, or at any other site you may find). 5.What about immediate annuities? Should we use the single corporate bond or the insurance annuities? We are both 65 years old. (Hint: go to immediateannuities.com, input our data, copy & paste the data in your report, and briefly explain the relevant numbers.)
Rasmussen College Deliverable Hypothesis Tests for Two Samples
Formulate and evaluate hypothesis tests for population parameters based on sample statistics using both Critical Regions a ...
Rasmussen College Deliverable Hypothesis Tests for Two Samples
Formulate and evaluate hypothesis tests for population parameters based on sample statistics using both Critical Regions and P-Values, and be able to state results in a non-technical way that can be understood by consumers of the data instead of statisticians.Student ProfileYou are a statistician working for a drug company. A few new scientists have been hired by your company. They are experts in pharmacology, but are not experts in doing statistical studies, so you will explain to them how statistical studies are done when testing two samples for the effectiveness of a new drug. The two samples can be dependent or independent, and you will explain the difference.Concept being StudiedYour focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.What to SubmitYour research and analysis should be presented on the Word document (attached) provided. All calculations should be provided on a separate Excel workbook (you must provide yourself) that should be submitted to your boss as well.YOU MUST MEET THE BELOW REQUIREMENTS: All problems are solved correctly. Complete and detailed steps are provided to explain how to solve the problem. Explanations demonstrate a mastery of understanding of the statistical concepts and terminology. All variables, equations, and expressions are properly formatted.
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