What can be said about the value of the dependent variable for values of the independent variable that are outside the range of the sample values? Explain.

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 Regression and Correlation Analysis

Select and use one independent variable throughout this analysis. Use Excel to perform the regression and correlation analysis to answer the following. The week 6 spreadsheet can be helpful in this work.

Generate a scatterplot for the specified dependent variable (Y) and the selected independent variable (X), including the graph of the “best fit” line. Interpret.

Determine the equation of the “best fit” line, which describes the relationship between the dependent variable and the selected independent variable.

Determine the correlation coefficient. Interpret.

Determine the coefficient of determination. Interpret.

Based on the findings in steps 1-5, analyze the ability of the independent variable to predict the dependent variable.

Compute the confidence interval for b, using a 95% confidence level. Interpret this interval.

Compute the 99% confidence interval for the dependent variable, for a selected value of the independent variable.

What can be said about the value of the dependent variable for values of the independent variable that are outside the range of the sample values? Explain.

Describe a business decision that could be made based on the results of this analysis. In other words, how might the business operations change based on these statistical results.
The report should explain and interpret the results in ways that are understandable to someone who does not know statistics.

What Probability Distribution ( for example: triangular distribution, discrete distribution, or shewed distribution etc.) could you apply to this working scenario or one that I have not listed?

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1. How can a Simulation Model help with your work? For example, In the electrical industry (electrician) a Simulation Model could be use to determine or used for etc

2. What Probability Distribution ( for example: triangular distribution, discrete distribution, or shewed distribution etc.) could you apply to this working scenario or one that I have not listed?

Explain why you would use this particular probability distribution and how would you apply it.

What draws you to math, and how have the principles of mathematics shaped your understanding of the world?

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What draws you to math, and how have the principles of mathematics shaped your understanding of the world?

What does the negative sign on the “r” tell us?

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1.A student is analyzing how two variables are correlated: size of committee and “efficiency” of committee. He reports to his friends that he had a correlation coefficient (r) of -0.85. What does the negative sign on the “r” tell us? (Hint: Don’t just say that the relationship is negative – explain what that means!!)

2. Consider again the r = -0.85. How strong does this appear to be, based on the textbook’s description of how to qualitatively interpret the size of “r”?

3. Think about the two variables and the “r” of -0.85. Why might his friends or colleagues think this researcher is lying about the correlation between group size and efficiency? Hint: think about both the strength AND direction of the correlation!

4. It is discovered that the Pearson correlation coefficient (r) for the correlation of education and income is .5, but for the correlation of education and support for wealth redistribution, it is only .2. Why would it not surprise us to find that the strength of the correlation is stronger in the first scenario than in the second?

5. Thinking back to the scenarios in the previous question, why aren’t either of the correlation coefficients closer to 1?

6. Explain why a person would be wrong to claim, “My correlation coefficient is positive, therefore the two variables are highly correlated.”

7. A student wishes to find the correlation between gender and income. Why is this not going to work, to try to compute “r” for assessing the relationship between these two variables? (HINT: think about what kind of variable each is!)

8. We didn’t cover this in the tutorial, but it’s possible for a “r” to be statistically insignificant even if it appears large (such as .65 or .70). This is impacted by sample size. Why would you trust an “r” based on 50 cases more than you would trust an “r” based on 5 cases?

9. Click on the .jpg file attached to this question. It is a scatterplot.

What does this scatterplot reveal about the relationship of states’ percentage of single parenthood and the violent crime rate? (r = .65)

10. If Mississippi (ms) was removed from the data set, the correlation coefficient would:

How do fractions relate to architecture

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How do fractions relate to architecture.

Write code for Data with R studio. Include plot in report

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Write code for Data with R studio. Include plot in report ( not R code) . Explain the output in Report.
Send R code as separate files.

Discuss Covid-19 or other disease which can use  code to apply.

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Discuss Covid-19 or other disease which can use  code to apply.

Write a project about a mathematician, and it should be a woman

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Write a project about a mathematician, and it should be a woman, or Latin, or black, and in fact, you have some names that you can choose from them only. The names are: Elbert Frank Cox
Valerie Thomas
Lonnie Johnson
Euphemia Lofton Haynes
Annie Easley
Mae Carol Jemison

What do students think of Computer Aided Assessment (CAA)?

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What do students think of Computer Aided Assessment (CAA)?