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The graph of a function is given.
(a) Determine the interval(s) on which the function is increasing. (Enter your answer using interval notation.)
(b) Determine the interval(s) on which the function is decreasing. (Enter your answer using interval notation.)
(b) Determine the interval(s) on which the function is decreasing. (Enter your answer using interval notation.)
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25
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3.5
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16
84
3.7
65
15
72
4.5
85
5.5
67
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89
MATH 140 Glendale College Exploring Relationships Between Two Variables Report
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MATH 140 Glendale College Exploring Relationships Between Two Variables Report
Math 140 Project: Exploring relationships between two variables In this project, you will search two quantitative variables that may have a linear correlation. You will describe and analyze the relationship between the variables the way it is explained in Chapter 4 (4.1-4.2). You will, then, create a written report including all 4 parts below and turn in by the stated due date according to the guidelines provided in this paper. Required components:1. Understand the Problema) Search for two quantitative variables that may have a linear correlation from the internet, in Canvas or any other media. You may also get the data by surveying 15-20 people. Possible websites to look for data:
You may obtain the data in StatCrunch.com: Click explore and click Data.
http://www.city-data.com/ for demographic information about cities
http://www.cde.ca.gov/ta/ac/ap/ for academic performance index.
http://graphics.latimes.com/responsivemap-pollutio... for pollution burdens.
Website where you found the data: b) Use your intuition and/or experience to predict and write down the descriptions of the possible relationship: Form, Direction, Strength, and outlier, etc. c) Develop a question that address a possible linear correlation between two variables. State the question(s):Identify two variables from the data that are relevant to answer the questions: 2. Analyze the paired Dataa) What is the likely explanatory variable in the paired data?b) Draw a scatter plot of the data. Does the graph show a linear relationship between the variables? Comment on the direction and strength appeared on the scatter diagram.c) Compute the linear correlation coefficient between the two variables and interpret the meaning specifically for your data. d) Find the equation of the least-squares regression line.e) Interpret the slope and y-intercept, if appropriate. f) Use the equation of the least-squares regression line to predict the outcome (y-value) for one of the x-values in your data.g) Find the residual for the x-value you chose in part (f). Explain what it means when a residual is positive or negative.3. Draw Conclusions a) What do the results indicate about the relationship between two variables? b) Do you think there is a causal relation between the variables? Explain. c) Relate the comments you made in step 1b before analyzing the data by commenting on both of the following: How your expectation differs (or do not differ) from the actual results? If it is relevant or meaningful in context, think of a way that these results could be used in practice.4. Summarize Write a short summary of the main findings that you discovered. Math 140 Project: Exploring relationships between two variables -Score Sheet (Total 50 points)Name:________________________________________ Date:__________________________________Title of the project: ____________________________________________________________________Website where you found the data:_______________________________________________________Project Grade: __________________________________
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This is assignment is due December 6, 2021. Linear Regression AnalysisTerry Downes owns a commercial cleaning company. He has conducted a survey of customers to determine how satisfied they are with the work performed. He devised a 100-point rating scale—with 0 being poor and 100 being excellent service, selected a random sample of 16 customers, and asked them to rate the service. He also recorded the number of worker hours spent in the customer's facility. These are in the file named Downes. Use Excel to complete the following:Develop a scatter plot showing the variables, rate of service, and worker hours, with the y variable on the vertical axis and the x variable on the horizontal.Develop a linear regression model to explain the variation in the service rating using a significant level alpha = 0.10Estimate the regression equation for the model.Use Word to complete a short report to include the following:The scatter plot describing the relationship of the variables and the estimated linear regression equation.The null and alternative hypotheses at the significant level alpha = 0.10The regression analysis showing the results of the pertinent hypothesis test, using a significance level of 0.10.The analysis of the linear regression indicating if the model is significant based on the p-value, e.g., rejecting or failing to reject the null hypothesis.The significance of the R2 (Coefficient of determination) in the model.Note: Submit your work in a Word document and attach your Excel file.By submitting this paper, you agree: (1) that you are submitting your paper to be used and stored as part of the SafeAssign™ services in accordance with the Blackboard Privacy Policy; (2) that your institution may use your paper in accordance with your institution's policies; and (3) that your use of SafeAssign will be without recourse against Blackboard Inc. and its affiliates.
Time (x)
Rating (y)
25
75
3
55
4
70
4.5
82
9
80
2.3
75
3.5
70
35
85
16
84
3.7
65
15
72
4.5
85
5.5
67
20
89
MATH 140 Glendale College Exploring Relationships Between Two Variables Report
Math 140 Project: Exploring relationships between two variables In this project, you will search two quantitative variable ...
MATH 140 Glendale College Exploring Relationships Between Two Variables Report
Math 140 Project: Exploring relationships between two variables In this project, you will search two quantitative variables that may have a linear correlation. You will describe and analyze the relationship between the variables the way it is explained in Chapter 4 (4.1-4.2). You will, then, create a written report including all 4 parts below and turn in by the stated due date according to the guidelines provided in this paper. Required components:1. Understand the Problema) Search for two quantitative variables that may have a linear correlation from the internet, in Canvas or any other media. You may also get the data by surveying 15-20 people. Possible websites to look for data:
You may obtain the data in StatCrunch.com: Click explore and click Data.
http://www.city-data.com/ for demographic information about cities
http://www.cde.ca.gov/ta/ac/ap/ for academic performance index.
http://graphics.latimes.com/responsivemap-pollutio... for pollution burdens.
Website where you found the data: b) Use your intuition and/or experience to predict and write down the descriptions of the possible relationship: Form, Direction, Strength, and outlier, etc. c) Develop a question that address a possible linear correlation between two variables. State the question(s):Identify two variables from the data that are relevant to answer the questions: 2. Analyze the paired Dataa) What is the likely explanatory variable in the paired data?b) Draw a scatter plot of the data. Does the graph show a linear relationship between the variables? Comment on the direction and strength appeared on the scatter diagram.c) Compute the linear correlation coefficient between the two variables and interpret the meaning specifically for your data. d) Find the equation of the least-squares regression line.e) Interpret the slope and y-intercept, if appropriate. f) Use the equation of the least-squares regression line to predict the outcome (y-value) for one of the x-values in your data.g) Find the residual for the x-value you chose in part (f). Explain what it means when a residual is positive or negative.3. Draw Conclusions a) What do the results indicate about the relationship between two variables? b) Do you think there is a causal relation between the variables? Explain. c) Relate the comments you made in step 1b before analyzing the data by commenting on both of the following: How your expectation differs (or do not differ) from the actual results? If it is relevant or meaningful in context, think of a way that these results could be used in practice.4. Summarize Write a short summary of the main findings that you discovered. Math 140 Project: Exploring relationships between two variables -Score Sheet (Total 50 points)Name:________________________________________ Date:__________________________________Title of the project: ____________________________________________________________________Website where you found the data:_______________________________________________________Project Grade: __________________________________
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