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Statistics homework help

Why is having precise and valid measurements so important?

Introduce yourself to the group and explain your background. Describe your professional goals.
Include what you hope to accomplish by the end of the course. Do you have any experience running statistical analyses in any context?
After reading the Module Overview and Chapter 1 in the textbook, choose something you measure at work or at home. Describe what it is, how you measure it, and why this method does or does not produce precise/reliable and valid measurements. Why is having precise and valid measurements so important?
Textbook link:  https://bncvirtual.com/vb_econtent.php?CSID=2O3K3TKKJMSZQMKAKTQUOOSOS&FVCUSNO=37315
Textbook: Basic Biostatistics: Statistics for Public Health Practice, Chapter 1 and Chapter 2
Video about statcrunch: https://www.youtube.com/watch?v=f-hMxX3FbiI

Categories
Statistics homework help

What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

In preparation for writing your report to senior management next week, conduct the following descriptive statistics analyses with Microsoft® Excel®. Answer the questions below in your Microsoft® Excel® sheet or in a separate Microsoft® Word document:
Insert a new column in the database that corresponds to “Annual Sales.” Annual Sales is the result of multiplying a restaurant’s “SqFt.” by “Sales/SqFt.”
Calculate the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables.
Create a box-plot for the “Annual Sales” variable. Does it look symmetric? Would you prefer the IQR instead of the standard deviation to describe this variable’s dispersion? Why?
Create a histogram for the “Sales/SqFt” variable. Is the distribution symmetric? If not, what is the skew? Are there any outliers? If so, which one(s)? What is the “SqFt” area of the outlier(s)? Is the outlier(s) smaller or larger than the average restaurant in the database? What can you conclude from this observation?
What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

Categories
Statistics homework help

What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

In preparation for writing your report to senior management next week, conduct the following descriptive statistics analyses with Microsoft® Excel®. Answer the questions below in your Microsoft® Excel® sheet or in a separate Microsoft® Word document:
Insert a new column in the database that corresponds to “Annual Sales.” Annual Sales is the result of multiplying a restaurant’s “SqFt.” by “Sales/SqFt.”
Calculate the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables.
Create a box-plot for the “Annual Sales” variable. Does it look symmetric? Would you prefer the IQR instead of the standard deviation to describe this variable’s dispersion? Why?
Create a histogram for the “Sales/SqFt” variable. Is the distribution symmetric? If not, what is the skew? Are there any outliers? If so, which one(s)? What is the “SqFt” area of the outlier(s)? Is the outlier(s) smaller or larger than the average restaurant in the database? What can you conclude from this observation?
What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

Categories
Statistics homework help

What priorities for quality improvements should the plant management set?

Assessment Task
You will conduct a review of the academic literature on the subject of statistical process control.
Following your review, you are to analyse a given set of data to evaluate the performance of a fictional brewery in a given scenario.
You will be expected to illustrate your discussion with examples from academic journals, the trade press and other authoritative sources.
The word count should be 2000 words ±10% (tables, diagrams and appendices are excluded from the count).
Assessment Breakdown
1. Prepare a literature review on the subject of Statistical Process Control, covering the concept from its inception up to the present day.
Ensure that you include references to at least 10 peer-reviewed articles, no more than ten years old. You may also acknowledge older works, providing they are of sufficient importance in charting the development of SPC.
(50% of word count)
2. The supplied spreadsheet contains historic data recording the temperature of combined effluent discharged by a fictional brewery, Waterside Lager Limited (WLL). The data comprises temperatures recorded four times a day over the month of September 2022.
The brewery’s discharges are normally controlled within the range 25oC to 35oC. The maximum legally permitted temperature is 40oC.
Regular maintenance is performed on the balancing system (which neutralises the pH of the effluent at the expense of heating the discharge in the process), normally on a weekly basis.
Use the data to visualise the performance of the effluent control process, describing your analytical approach in detail. Include any graphs generated.
In your view, how well has the plant performed?
What priorities for quality improvements should the plant management set?
(50% of word count)

Categories
Statistics homework help

What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

In preparation for writing your report to senior management next week, conduct the following descriptive statistics analyses with Microsoft® Excel®. Answer the questions below in your Microsoft® Excel® sheet or in a separate Microsoft® Word document:
Insert a new column in the database that corresponds to “Annual Sales.” Annual Sales is the result of multiplying a restaurant’s “SqFt.” by “Sales/SqFt.”
Calculate the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables.
Create a box-plot for the “Annual Sales” variable. Does it look symmetric? Would you prefer the IQR instead of the standard deviation to describe this variable’s dispersion? Why?
Create a histogram for the “Sales/SqFt” variable. Is the distribution symmetric? If not, what is the skew? Are there any outliers? If so, which one(s)? What is the “SqFt” area of the outlier(s)? Is the outlier(s) smaller or larger than the average restaurant in the database? What can you conclude from this observation?
What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

Categories
Statistics homework help

Discuss the concepts of hypothesis testing.

QUESTION 1
Respond to the following in a minimum of 175 words:
Discuss the concepts of hypothesis testing, including what you are evaluating, when it should be used, and the differences between a one- and a two-tailed test.
Describe an example from your own personal or professional experiences where you could apply a hypothesis test, and discuss how knowing that information helped you.
QUESTION 2

This week’s required readings explain the role that analytics plays in the modern business environment. Consider the following questions and respond in a minimum of 175 words:
How is data analytics different from statistics?
Analytics tools fall into 3 categories:descriptive, predictive, and prescriptive. What are the main differences among these categories?
Explain how businesses use analytics to convert raw operational data into actionable information. Provide at least 1 example.
Consider the organization you work for (or another organization you’re familiar with). Does this organization use data analytics?If so, how is it used? If not, how could the organization use data analytics to improve its performance?

Categories
Statistics homework help

How is data analytics different from statistics?

QUESTION 1
Respond to the following in a minimum of 175 words:
Discuss the concepts of hypothesis testing, including what you are evaluating, when it should be used, and the differences between a one- and a two-tailed test.
Describe an example from your own personal or professional experiences where you could apply a hypothesis test, and discuss how knowing that information helped you.
QUESTION 2
This week’s required readings explain the role that analytics plays in the modern business environment. Consider the following questions and respond in a minimum of 175 words:
How is data analytics different from statistics?
Analytics tools fall into 3 categories:descriptive, predictive, and prescriptive. What are the main differences among these categories?
Explain how businesses use analytics to convert raw operational data into actionable information. Provide at least 1 example.
Consider the organization you work for (or another organization you’re familiar with). Does this organization use data analytics?If so, how is it used? If not, how could the organization use data analytics to improve its performance?

Categories
Statistics homework help

 What was your independent variable?

What was your independent variable? What question did it ask of a respondent? If you created your own dataset, what was the source of this data and did you cite it? How was your variable measured (continuous, categorical, binary, etc.) and did you transform or recode in any way? Did you remove any observations from your dataset?

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Statistics homework help

Explain how the article applies to the real world, your major, your current job, or your future career goal.

Scenario: You are submitting an application to a professional conference on data-driven decision making. The application has two parts:
Providing information to the conference organizers.
Creating a presentation for the conference audience.
Steps to complete: In Week 9, complete and submit your assignment in Blackboard using the following steps:
STEP 1: Visit one of the following newspapers’ websites: USA Today, New York Times, Wall Street Journal, or Washington Post. Select an article that uses statistical data related to a current event, your major, your current field, or your future career goal. The chosen article must have been published after the start of this term.
Examples may include:
Elections/exit polls
Award shows (Oscars/Emmys/Grammys)
Sports
Economy/job market
Gender equality
Human rights issues
The article should use one or more of the following categories of descriptive statistics:
Measures of Frequency – Counting Rules, Percent, Frequency, Frequency Distributions
Measures of Central Tendency – Mean, Median, Mode
Measures of Dispersion or Variation – Range, Variance, Standard Deviation
Measures of Position – Percentile, Quartiles
Note: Once you navigate to a publication’s website, it may be easiest to do a search with a statistics-related word (ex: standard deviation).
The publications listed are suggestions. If you find an article from another source OR if you are uncertain the article contains all of the information necessary to complete the assignment, please let your instructor know. Your instructor can help you determine whether it is a good fit for this assignment. If you need additional help locating an article, contact a Strayer librarian for more assistance. Remember to review the examples in the Week 6 Discussion.
STEP 2: Using the data from your article, use the template included in this assignment to answer the following questions asked by the conference organizers. Remember to consider their expertise as mathematical professionals and use appropriate language to communicate your findings:
Highlight the purpose of the article and the problem it is trying to solve. Think summary, in bullet-form.
Explain how the article uses descriptive statistics to communicate information found in the study and/or any conclusions/solutions.
Explain how the article applies to the real world, your major, your current job, or your future career goal.
Recommend solutions using the mathematical and visual data provided.
STEP 3: An additional part of the application process requires you to create a presentation based on the information provided in the template.
Based on your topic, choose an audience (outside of the field of mathematics) that could benefit from the information you will present. For example, this could be your local city council member, staff or administrators of a school, or employees at a company.
Analyze the data in the article to determine the best visual (graph or chart) to tell the story to your audience.
In PowerPoint or other presentation tool, create one visualization of the data appropriate for the conference audience. NOTE: If the article already contains a visual, you must create a different type of graph or chart.
Identify the audience and explain how the audience can benefit from the data.
Recommend your identified solutions using language appropriate for the audience.
STEP 4: In the notes section of your final slide, answer the following questions:
Explain why you chose the audience in Part B.
Describe how the visuals used in the PowerPoint are appropriate for the audience.
STEP 5: Format your presentation according to the Strayer Writing Standards. For assistance and information, please refer to the Strayer Writing Standards link in the left-hand menu of your course. Check with your professor for any additional instructions.
STEP 6: Submit your assignment in two parts:
The Week 9 Assignment Template
Your presentation

Categories
Statistics homework help

Is it more expensive or less expensive to live in FL or NY?

Review the attached file. Suzie has an issue. She can either move to NY or FL and needs to review some data that her agent gave her. The agent reviewed house prices and crime ratings for houses that Suzie would be interested in based on her selection criteria. She wants to live in an area with lower crime but wants to know a few things:
Is it more expensive or less expensive to live in FL or NY?
Is the crime rate higher in FL or NY (Note a low score in crime means lower crime)?
Is the crime rate higher in lower or higher house price areas?
Using the R tool, show the data in the tool to answer each of the questions. Also, show the data visualization to go along with the summary.
If you were Suzie, where would you move based on the questions above?
After you gave Suzie the answer above (to #4), she gave you some additional information that you need to consider:

She has $100,000 to put down for the house.
If she moves to NY she will have a job earning $120,000 per year.
If she moves to FL she will have a job earning $75,000 per year.
She wants to know the following:

On average what location will she be able to pay off her house first based on average housing prices and income she will receive?
Where should she move and why? Please show graphics and thoroughly explain your answer here based on the new information provided above.

Note: The screenshots should be copied and pasted and must be legible. Only upload the word document. Be sure to answer all of the questions above and number the answers. Be sure to also explain the rational for each answer and also ensure that there are visuals for each question above. Use at least two peer reviewed sources to support your work.