Mathematics

Consider how different distributions might affect the different graphs. How might other variables affect the graphs? How could graphs be made to be biased? If a graph were biased, how might you change it to guard against that bias? here is the follow up post to base this discussion off of: For each data set I would organize by using a frequency table. This will provide a structured approach to creating the graphs and help ensure no data is lost or overlooked because of a mess of values. For the first set of data I would use a bar graph. I would categorize the data by body part injured. These categories justify the use of a bar graph. “…bar graphs are constructed to provide a visual display of the counts of nominal or ordinal data.” (Humphrey, et al, 2020) The y-axis would represent the number of patients and the x-axis would list the injuries. For the second set of data I would use a histogram graph. This data set is dealing strictly with numbers. “Histogram Graph: Graph best used with quantitative, usually continuous data.” (Chamberlain, 2020) I would interview each patient to determine the amount of time spent in the waiting room. The y-axis would represent the number of patients and the x-axis would have the time spent in the waiting room. I would display the time in 5-minute intervals. Humphrey, P., Taylor, S., & Cage, K. (n.d.). Developing Consistency in the Terminology and Display of Bar Graphs and Histograms. Retrieved July 14, 2020, from https://web-a-ebscohost-com.chamberlainuniversity.idm.oclc.org/ehost/detail/detail?vid=4 Chamberlain University College of Nursing (2020). Week 2 Lesson: Introduction to Statistics: Graphing and Describing Data. Chamberlain University College of Nursing. https://chamberlain.instructure.com accessed on July 14, 2020.

Note: The assessments in this course build upon each other, so you are strongly encouraged to complete them in sequence. Download and save the Assessment 2: Central Tendency and Probability [DOCX] worksheet. Complete the worksheet, and submit it for your assessment. Competencies Measured By successfully completing this assessment, you will demonstrate your proficiency in the following course competencies and assessment criteria: Competency 1: Apply appropriate notation, terminology, procedures, and concepts to statistics problems. Describe a distribution. Calculate measures of variability in Excel from a group of raw scores. Calculate measures of variability in SPSS from a group of raw scores. Solve problems with information about normal distributions and probabilities. Calculate z scores using SPSS. Competency 2: Form logical conclusions about real-world problems through descriptive and inferential statistical procedures. Interpret means and standard deviation in a chart. Complete problems that apply principles and procedures related to central tendency, variability, and probability. Note: The assessments in this course build upon each other, so you are strongly encouraged to complete them in sequence. This assessment focuses on measuring central tendency, especially the characteristics and calculating the mean, median, and mode. It will also help you practice your skills in variability, which is measured by range and standard deviation. The assessment also focuses on probability, which is the likeliness of a specific instance occurring.

Gather and Analyze Data You have been charged with creating a survey for your community! The community is interested in having you create a survey and present the results at the next town hall meeting. In this project, students will: Learn about quantitative variables. Learn to analyze data for measures of central tendency (mean, median and mode) Learn to create an effective presentation with real-world conclusions. To complete this project you will: Think of a problem within your community or workplace. The problem needs to be something others will have an interest in solving or will want to share reactions to. Create a 10 question survey with quantitative variables (number) on a topic you are interested in. Think of questions where 0 is dislike there is a scale to 4- like. Another way to do this is using 0-never, 1 sometimes, 2 frequently, and 3 always. Administer the survey to a minimum of 10 people. Analyze your data for the mean, median, and mode of each questions. Create a visual from this chapter: bar graph, box and whisker plot, histogram, stem and leaf plot. etc. Compile the information into a slide presentation, of at least 5 slides, to present at the next town hall. The presentation should present: the mean, median, and mode of each question, the visual of the data, and conclusions based on the statistics you found in the survey.

This is just a homework assignment I am needing the answers to Question 1 Find the correct excel formula to find the total in a savings account: Monthly Amount = $1800 Interest Rate = 0.15% Years in Account = 25 Group of answer choices =FV(0.0015/12,25*12,-1800) =FV(0.15/12,25*12,-1800) =FV(0.0015,300,-1800) =FV(0.15/12,300,-1800) =FV(.0015/12,25*12,1800) Question 2 An employer will do a 50% match on your investment to a 401k retirement plan. If you decide to contribute a monthly amount of $220, how much should be in the account after 15 years? The interest rate is fixed at 2.05%. Question 3 Find the total in the account with the following facts: Monthly contributions = $180 Employer matching = 25% Interest rate = 4.99% Years invested = 38 Question 4 John makes $2,800 per month and has an opportunity to invest $150 per month at an APR of 4.5% in a 401K plan through work. He plans to retire in 30 years. Type in the EXACT formula you would use in excel (no spaces) to find the amount in the account after he has invested for 30 years. Using excel, what is the answer to the formula from the previous part? How much money will he deposit into the 401K over the 30 years? How much total interest will he earn on his 401K over the 30 years? Question 5 You have recently signed up for a new job and noticed this policy for retirement savings. Invest $200 and the employer does 70% matching for 35 years at an interest rate of 4.8%. Find the total amount that the employer contributes each month. What amount will you have after 35 years? How much money have you deposited into the account yourself? How much more money is in the account than what you have deposited? Question 6 Consider this scenario: In 1986, a family member invested $100 each month into a savings account with an interest rate of 0.25% (that didn’t change). In 2016, you decided you needed to use that saved up money for a big purchase, so you cash the savings account out. How much money should be in the account using the FV formula? If your family put the $105 each month instead of just the $100, how much extra would be in the account compared to the total value from the first part? If you were to invest $200 each month, what would your savings account have in 2016? Question 7 How much interest did you gain if you invested in a retirement plan with a rate of 2.5% over 42 years? Your monthly deposits totaled $520.

1-The revenue from the sale of a product is, in dollars, R = 1500x + 3000(4x + 3)?1 ? 1000 where x is the number of units sold. Find the marginal revenue when 200 units are sold. (Round your answer to two decimal places.) $ Interpret your result. If the sales go from 200 units sold to units sold, the revenue will increase by about $ .

Please double-check all work and proofread every answer. Thank you very much. Also: For problem 1, the denominator is supposed to be: 4^n +cos^2(n) In addition, for problem 1, the professor says to apply this: “Since you are squaring the cosine and sine terms they will always be positive so what is there max/min value? Can you come up with a series that compares to the one in the problem that you can directly compare?”

(a) (9 points) Solve the initial value problem y00 + 16y = ?(t?1) y(0) = 0, y0(0) = 0 where ?(t?1) is the Dirac delta function at t0 = 1. (b) (3 points) Let yk(t) denote your solution from part (a) and let ˆ y(t) denote your solution from part (a). Show that when t = 2lim k?+?yk(2) = ˆ y(2)Just answer question B and C is ok

Graphical displays are used to provide the viewer information that illustrates qualitative or quantitative information about the data set under review. After reading the assigned sections in Chapter 2, please provide an example of where you think a graphical display could be used incorrectly. What ramification(s) do you think could result from the graphical display in your example being used incorrectly? Textbook reference for one of the references needed  Sullivan III, M. (2017) Statistics: Informed decisions using data (5th ed.). Upper Saddle River, NJ: Pearson Education, Inc.

Design a presentation  to teach a client the difference between qualitative and quantitative variables.

Research a news article or website that provides data sets and statistical report information such as the United States Census Bureau  (Links to an external site.) , the U.S. Energy Information Administration  (Links to an external site.) , the Centers for Disease Control and Prevention’s National Center for Health Statistics  (Links to an external site.) , or the National Center for Education Statistics  (Links to an external site.) . Your selected news article or website should provide enough information to allow you to fully answer each of the questions below. For your post, identify your selected news article or website using correct APA formatting followed by your fully developed answers to each of the following: Describe the role of statistics in the news article or report. What was the population of the study? What was the sample? Do you believe the statistical results are believable and meaningful? Use the guidelines mentioned in Chapter 5C to explain why the results are believable and meaningful (or why not). What sorts of statistics (e.g., graphical, non-graphical, hypotheses, correlation, averages, etc.) were used in the report? How was the data distributed? How are distribution and variation important in any statistical study? Was any margin of error mentioned in the report? If no margin of error was mentioned, then assume that it is 2%. Interpret the margin of error in terms of 95% confidence interval. Your initial post should be at least 250 words in length. It should show all the required math work and explain all the steps. Also include a simple reference for any used resource. For example: Washington Post dated August 13, 2018 or retrieved from .