Statistics Archives | Page 2 of 11

Interpret the Correlation in the Context of the Data

Interpret the Correlation in the Context of the Data Using Excel graph a scatterplot of the data. (4p)

Describe the type of correlation and interpret the correlation in the context of the data. Be specific in describing the magnitude, direction, and strength of the relationship.

Calculate the sample correlation coefficient for the data. (Pearson correlation coefficient between hours spent studying, x, and test score, y). (Round your final answer to three decimal places). (7p)

Show all work and outputs in excel as well as on each question. Can be typed on word docs. The excel scatter plot must include all the outputs. All directions and questions are included in the attachment below.

Interpret the Correlation in the Context of the Data

DIRECTIONS: Make sure your responses are neat and readable. You must show me your calculation in a separate piece of paper. Homework that is difficult to grade due to messiness will be returned ungraded. If you would like to get full credit, do not forget to attach the Excel output.

The number of hours 9 students spent studying for a test and their scores on that test is represented in the table below.

Hours spent

studying, x

0 2 4 5 5 5 6 7 8

Test scores, y 40 51 64 69 73 75 93 90 95

1) Using Excel graph a scatterplot of the data. (4p)

2) Describe the type of correlation and interpret the correlation in the context of the data. Be

specific in describing the magnitude, direction, and strength of the relationship. (6p)

Interpret the Correlation in the Context of the Data

3) Calculate the sample correlation coefficient for the data. (Pearson correlation coefficient

between hours spent studying, x, and test score, y). (Round your final answer to three decimal places). (7p)

4) Write out the null and alternative hypotheses and conduct a hypothesis testing for the data. At the 5% level of significance, is your test statistic statistically significant? Briefly explain how you reached your conclusion.

For this question you must state followings: degrees of freedom, one or two-tailed hypothesis testing, the critical value, test statistic, do you reject or fail to reject the null hypothesis. (19p)

5) Find the equation of the regression line for the hours spent studying and test scores of students. Compute the a (intercept) and b(slope) values of the regression formula, Y = a + bX for predicting test scores variable from hours spent studying variable. Write the formula replacing a and b by their respective numerical values (round off each element in the final formula to three decimal places). (13p)

6) What is the predicted test score for a student who spent 3 hours studying for the test?

We can write this or a similar paper for you! Simply fill the order form!

The ASA’s Statement on p-Values

The ASA’s Statement on p-Values: Context, Process and Purpose

Ronald L. Wasserstein & Nicole A. Lazar

To cite this article: Ronald L. Wasserstein & Nicole A. Lazar (2016) The ASA’s Statement on p-Values: Context, Process, and Purpose, The American Statistician, 70:2, 129-133, DOI:10.1080/00031305.2016.1154108

To link to this article: https://doi.org/10.1080/00031305.2016.1154108

View supplementary material Accepted author version posted online: 07 Mar 2016.Published online: 09 Jun 2016.

THE AMERICAN STATISTICIAN

EDITORIAL

The ASA’s Statement on p-Values: Context, Process, and Purpose

In February 2014, George Cobb, Professor Emeritus of Mathematics

and Statistics at Mount Holyoke College, posed these

questions to an ASA discussion forum:

Q: Why do so many colleges and grad schools teach p = 0.05?

A: Because that’s still what the scientific community and journal

editors use.

Q: Why do so many people still use p = 0.05?

We can write this or a similar paper for you! Simply fill the order form!

Recommendation using statistical data

Recommendation using statistical data.

The paper should be done as a memo and it should be around 3 pages including the data

Writing Assignment 2.3: Business Memorandum

Problem description: You oversee a manufacturing facility that produces an automotive part (steel shaft for the gearbox). The acceptable dimension of the shaft is 2.5±0.05 inches in diameter with the most desirable product being exactly 2.5 inches. Two vendors are trying to sell their equipment for the shaft-machining task to your company, Automotive Parts Corporation. You have been asked to assess the equipment from each vendor, and to make a recommendation on which one to make the purchase from, supported by a justification for your decision.

You asked both vendors to supply data on the machining accuracy of their equipment for the given task. Both vendors machined 100 shafts, collected data, plotted histograms, fitted the histograms with normal distributions and supplied you with their findings

Let X= diameter in inches of the gearbox shaft

Ace Machines: X has a normal distribution with mean 2.48 and variance 0.001

Best Machinery: X has a normal distribution with mean 2.51 and variance 0.002

When you are completing your memorandum be sure to address the following:

Recommend a vendor using the given information, develop and discuss your approach (give all details including quantitative justification). Your response to this question must be directed to the audience described below.
Examine the scenario as described and discuss what additional information would be helpful to make this recommendation a stronger selection, and why that information would be useful. Be careful not to negate your recommendation as you explain this.
Include your calculations as a titled addendum on its own page at the end of your document.

Audience: You are creating this document for the company’s Chief Operating Officer, Lin Gerard, and copying the Chief Financial Officer, Aileen Kitts. Documents involved in major financial decisions like this may also be distributed by the addressees to other executives and the corporate board members.

Document: Complete this assignment as a memorandum. Follow the guidance for business memorandum provided in your reading. Utilize clear, professional language, including setting your Word preferences to check for a more professional writing approach. Examples of professional language constraints would include:

Utilize plain language.

Develop the document around a direct, coherent message (thesis and clear analysis to support it.

Do not use contractions, slang or colloquialisms, cliches, abbreviations, or text message shortcuts.

We can write this or a similar paper for you! Simply fill the order form!

C++ program Assignment Help Available

C++ program

All you have to do is write a program that allows the user to populate two 2D arrays of integers (3 x 3 matrix) by calling the function InitMatrix. After the user has entered all the values, then call the function DispMatrix to display the two matrices. Then you can call the functions AddMatrices, TMatrix, and DetMatrix to calculate the addition of the matrices, the transpose of each matrix, and the determinant of each matrix respectively.

InitMatrix will take as argument a 2D array and the number of rows and have a void return type. It will prompt the user to enter 9 total values for a 3 x 3 matrix.

DispMatrix will take as argument a 2D array and the number of rows and have a void return type. It will display the contents of the 2D array. Hint: I suggest you use the setw() function to display the matrices nicely.

AddMatrix will take as argument two 2D arrays and the number of rows and have a void return type. It will add two 2D arrays and call DispMatrix to output the result.

TMatrix will take as argument a 2D array and the number of rows and have a void return type. It will switch the rows and columns and call DispMatrix to output the result.

DetMatrix will take as argument a 2D array and the number of rows and have an int return type. It will calculate the determinate of a 2D array and return the result as an int.

Here’s a sample run:

Please enter 9 integer values for the first matrix:
[0][0]: 6
[0][1]: 1
[0][2]: 1
[1][0]: 4
[1][1]: -2
[1][2]: 5
[2][0]: 2
[2][1]: 8
[2][2]: 7

Please enter 9 integer values for the second matrix:
[0][0]: 12
[0][1]: 4
[0][2]: 11
[1][0]: -3
[1][1]: 7
[1][2]: -9
[2][0]: 4
[2][1]: 8
[2][2]: 21

The matrices you’ve entered are:
6 1 1
4 -2 5
2 8 7

12 4 11
-3 7 -9
4 8 21

The sum of the matrices are:
18 5 12
1 5 -4
6 16 28

The transpose of the matrices are:
6 4 2
1 -2 8
1 5 7

12 -3 4
4 7 8
11 -9 21

The determinant of the matrices are: -306 and 2164

We can write this or a similar paper for you! Simply fill the order form!

Simulation Game And Supply Chain

Play a simulation game for 1 week, not every day. Make changes that increase the cash position of the company.

Make a presentation which should include

strategy explained
forecast made and explained
cost calculations made and explained
modification of tactics and operational decisions during the simulation
include graphs The Beer Game is a role-play simulation game that lets participants experience typical coordination problems of (traditional) supply chains, in which information sharing and collaboration do not exist. In more general terms, this supply chain represents any non-coordinated system where problems arise due to lack of systemic thinking.

We can write this or a similar paper for you! Simply fill the order form!

Programming Using R Assignment Help

Programming Using R

carData use R

The dataset “GSSvocab” from the package “carData” in R is from the General Social Survey (GSS) from the National Opinion Research Center (NORC) of the University of Chicago. Your assignment is two parts: write up a script to answer the questions; write a word document report (complete with all relevant figures and tables) to provide a decision as if you were presenting this as a stand-alone document to a superior.

Suppose you work for an educational testing program; your boss wishes to understand how gender, age, education, and year of testing effects the vocabulary score of the students you have tested. It will be your job to present the findings from your analysis and decide whether or not there exists a relationship between these variables AND to predict the vocabulary score for the students in 2020 based upon your model.

Fulfill the following steps at a MINIMUM to answer the question:

Run the following code to get the data:

install.packages(“carData”)

library(carData)

(data <- GSSvocab)

head(data)

Find an interesting relationship to look at graphically; include a grouping variable for gender so that you are able to compare the groups in a meaningful way.

Develop a linear model with more than one predictor that is suggested by your boss.

Examine if this is the best model depending upon your data set.

Determine if there is a difference between male and female test takers.

Predict for a future student based on the model that you think most accurately develops the relationship you have identified.

We can write this or a similar paper for you! Simply fill the order form!

Graphs and tables after taking a survey

Need to use graphs and tables after taking a survey.

Project Information
Each student needs to turn in a report on a survey result. Any topic of the student’s interest may be selected, but online survey (voluntary sampling) is not permitted.
• It is due on Thursday, March, 28.
• The survey should include at least 35 individuals or subjects.
• Write your title describing what it is about.
• The data need to be the original (collected by you).
• Write a report on your findings.
• Turn in a 3 page report. Include graphs and tables (at least 3) for your report.
• In your report, describe how you obtained the data (where, when, and how).
• Also turn in a rough draft (the collection of the data).
• It will be a maximum of 20 points.

We can write this or a similar paper for you! Simply fill the order form!

Department of Mathematics and Statistics

This is an assignment for stats. I highly believe it can be done within 1 page or 1 and a ?half. This assignment is worth only 3 per cent, therefore, I do not want to spend much. Please have a look and let me know

MEMORIAL UNIVERSITY OF NEWFOUNDLAND
Department of Mathematics and Statistics
Assignment #2 STAT 2500-001 W19 Due on Tuesday, Feb. 12, 5:00pm
1. The probability distribution is
x -1 0 1 2 3
p(x) 0.2 0.15 0.25 0.3 0.1
Compute the expected value and the variance of the random variable. (10)
2. A study revealed that 70% of students from heavy-smoking families showed signs of nasal allergies on physical exams. Consider a sample of 25 students exposed daily to heavy smoking. (15)
(a) What is the probability that fewer than 20 of the students will have nasal allergies?
(b) What is the probability that more than 15 of the students will have nasal allergies?
(c) On average,how many of the 25 students would you expect to show signs of nasal allergies?
3. Use results from an output you obtained from the R software. Suppose x is a binomial random variable. Find the following probabilities: (15)
(a) P(x = 5) for n = 10, p = 0.3
(b) P(8 < x < 18) for n = 20, p = 0.7
(c) P(x < 7) for n = 20, p = 0.6
4. Use results from an output you obtained from the R software. Suppose x is a normal random variable. Find the following probabilities: (15)
(a) P(x = 5) for µ = 5, s = 0.3
(b) P(8 < x < 18) for µ = 15, s = 5
(c) P(x < 7) for µ = 5, s = 1
5. The length of time it takes MUN students to find a parking spot around St. John’s campus follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute. Find the probability that a randomly selected student will take between 1 and 3 minutes to find a parking spot on campus. (15)
6. A fair coin is tossed 100 times. What is the probability of observing at least 55 heads
P(x=55)? (Approximate the binomial distribution with a normal distribution) (15)
1
7. The board of examiners that administers the real estate broker’s examination in a certain state found that the mean score on the test was 490 and the standard deviation was 72.
If the board wants to set the passing score so that only the best 10% of all applicants pass, what is the passing score? Assume that the scores are normally distributed. (15)

We can write this or a similar paper for you! Simply fill the order form!

Business Statistics Research Paper Available

Business Statistics

As a manager you will need the basics of data manipulation, data analysis, and data reporting for decision making. Particularly, knowledge of basic data analysis principles is critical for managers in any industry. SAS provides two approaches to data analysis: the Programming Approach and the Point and Click Approach.

o Use the BASEBALL dataset to practice each of the steps of the “programming” approach and save your output.

o Prepare a 2-page set of directions with examples (screen shots or written scenarios) to explain data analysis by programming.

o Format your directions consistent with APA guidelines, including cover and reference pages.

We can write this or a similar paper for you! Simply fill the order form!

Statistics on different countries Assignment

Statistics on different countries

the assignment is to find the 1) GDP Per Capita 2)Inflation Rate 3)Unemployment
Rate 4) Growth Rate 5) Structure meaning the Industries, agriculture, services.
6) International Trade meaning trade partners in import and export and what products in particular. All this information that you find have to be from the
year 2006, 2010 and 2018. You have to find each of these statistics for the following countries. United States, Germany, Japan, China, India, Brazil,
Singapore, Israel and Switzerland. Make sure to find all the statistics that I mentioned for each of these countries and also make sure to do it using a table
so it can be viewed appropriately. Perhaps you can do it on excel or however you prefer, get creative. It is important that you only find the statistics for the
years I’ve mentioned.

We can write this or a similar paper for you! Simply fill the order form!