Category: Statistics

Find the variances, z-scores, selecting data set, calculate de median, the standard deviation, create a histogram, others.

Find the variances, z-scores, selecting data set, calculate de median, the standard deviation, create a histogram, anothers

About: In this assignment, you will examine various scenarios involving a hypothesis test we have been working with called the independent samples t-test. The objective is to understand the statistical process of testing hypotheses and interpreting results. You will analyze provided data and write a report explaining the populations, variables, which one is the independent and dependent variable, and the results of the hypothesis test.
Directions: Select ONE scenarios and complete the following report for each scenario.
IntroductionReview the provided data describe the goal of the research including what the independent and dependent variable is. Provide the Null and Research hypothesis based on the data provided.
Methods
Describe the data including sample sizes for each group, mean hours for each group, variance, and observable differences
State that the independent samples t-test was conducted and provide all the important results (t-statistic, p-value, degrees of freedom)
3. Results
Interpret the results, is there a statistically significant relationship?
Do we accept or reject the null hypothesis?
Are the two variables related to one another?
4. Discussion
Discuss any potential limitations of the test and results
Provide some thoughts on why we obtained the results we obtained, consider various logical explanations
Word Count: Each report should be about 300 words or more, giving about 75 to 100 words per section in the directions provided.
Scenarios: Similar to the prep-lab, and the here are some scenarios of various statistical outputs involving t-tests. Select ONE of the following to complete your assignment
T-Test Lab Scenario 1: Chores by Gender/Sex
T-Test Lab Scenario 2: Number of Energy Drinks by Student Status
T-Test Lab Scenario 3: Retired vs Non-Retired & Stress Scores
T-Test Lab Scenario 4: Working Class vs Middle Class & Hours Spent on Leisure
T-Test Lab: Scenario 1
Chores by Gender/Sex
Important: Before completing the scenarios be sure you have completed the pre-lab and have looked at the directions in the Lab Analysis #1 Assignment.
About: In this scenario the researcher is interested in seeing if there is a difference in hours spent on chores per week based on Gender/Sex. Here are their results! Be sure to look at only the one-tailed p-value results.
Statistical Output
Descriptive Statistics: Hours Spent on Chores per Week by Sex
SamplesNMeanVariance
Males3146.4 hours5.5
Females4457.5 hours3.7
T-statistic Output
T-statisticdegrees of freedomOne-Tailed (Sig.)Two-Tailed (Sig.)
3.9757p = .000052p = .000105
If you have selected this scenario, complete the lab analysis #1 based on these outputs. Feel free to copy and paste these outputs onto a word document along with the instructions of Lab Analysis #1 to begin your Lab Analysis.
T-Test Lab: Scenario 2
Energy Drinks by Student Status
Important: Before completing the scenarios be sure you have completed the pre-lab and have looked at the directions in the Lab Analysis #1 Assignment. Remember you just have to choose two scenarios.
About: In this scenario the researcher is interested in seeing if there is a difference in energy drinks consumed per week based on student status (student vs non-student). Here are their results! Be sure to look at only the one-tailed p-value results only.
Statistical Output
Descriptive Statistics: Energy Drinks by Student Status
SamplesNMeanVariance
Students561.1.33
Non-Students710.25.65
T-statistic Output
T-statisticdegrees of freedomOne-Tailed (Sig.)Two-Tailed (Sig.)
1.855125p = .032976p = .065952
If you have selected this scenario, complete the lab analysis #1 based on these outputs. Feel free to copy and paste these outputs onto a word document along with the instructions of Lab Analysis #1 to begin your Lab Analysis.
T-Test Lab: Scenario 4
Hours of Leisure by Class
Important: Before completing the scenarios be sure you have completed the pre-lab and have looked at the directions in the Lab Analysis #1 Assignment.
About: In this scenario the researcher is interested in seeing if there is a difference in hours spent on leisure per week based on Social Class. Here are their results! Be sure to look at only the one-tailed p-value results.
Statistical Output
Descriptive Statistics: Hours of Leisure based on Social Class
SamplesNMeanVariance
Middle Class
5038.96.5
Working Class4787.1 hours
7.8
T-statistic Output
T-statisticdegrees of freedomOne-Tailed (Sig.)Two-Tailed (Sig.)
1.033979p = .15093p = .301859
If you have selected this scenario, complete the lab analysis #1 based on these outputs. Feel free to copy and paste these outputs onto a word document along with the instructions of Lab Analysis #1 to begin your Lab Analysis.
T-Test Lab: Scenario 3
Stress Scores by Retired Status
Important: Before completing the scenarios be sure you have completed the pre-lab and have looked at the directions in the Lab Analysis #1 Assignment. Remember you just have to choose two scenarios.
About: In this scenario the researcher is interested in seeing if there is a difference in Stress based on retired status (retired vs not retired). Here are their results! Be sure to look at only the one-tailed p-value results only.
Statistical Output
Descriptive Statistics: Stress Scores by Retired Status
SamplesNMeanVariance
Retired3413.25.6
Not Retired
5516.87.9
T-statistic Output
T-statisticdegrees of freedomOne-Tailed (Sig.)Two-Tailed (Sig.)
4.90187p <.001 p <.001 If you have selected this scenario, complete the lab analysis #1 based on these outputs. Feel free to copy and paste these outputs onto a word document along with the instructions of Lab Analysis #1 to begin your Lab Analysis.

Journal activity: Real-World Applications of
QM Project
I have created a journal activity that consists in Choosing a topic of interest and writing a short paragraph (no more than 10 lines) to showcase how
Quantitative methods are used in various fields.

This is STAT 101 PLS SEND IT AS A MICROSOFT WORD .
Visit one of the polling sites listed and choose one poll to analyze
1- Go to one of these sites: Quinnipiac PollLinks to an external site., Marist PollLinks to an external site., 538Links to an external site. (political polling), Washington Post Poll,Links to an external site. Fox News PollLinks to an external site.. (Note: the first two, Quinnipiac and Marist, are academically based well respected polling centers. The last two are journalistic and are known to have a particular point of view (bias)Links to an external site., the Washington Post leans ‘left’ and Fox New is decidedly ‘right’, politically speaking.
Spend a little time clicking on the different topics and polls – those that you find interesting – look at the dates, questions, answers and answer patterns (%s) and other information (N, Margin of error!)…
2- After you have looked at many questions, choose one poll and one question (& its answers) to use for this discussion.
Ensure that it is a poll that is recent – not old!
You’ll need the percent for one of the responses to the question and the N. Look for the N in the ‘fine print’ – if you chose a legitimate poll, it should have the N and their margin of error calculation available near the poll findings.
3- Then, for the question you chose, post the following – using the question topic as your post subject
1- the link to the web page where you got the data so we can go look at it
2-your own calculation of the margin of error (for one of the answer categories) and whether or not your margin of error matches the one they stated, and
3- a brief interpretation of the results – use the sentence structure we use in our class work.
I uploaded an example for this question. please do it correctly and as the example provided!!!!! Thanks
here are the links .
https://poll.qu.edu/.
https://maristpoll.marist.edu/latest-polls/.
https://projects.fivethirtyeight.com/polls/
https://www.washingtonpost.com/politics/polling/
https://www.foxnews.com/official-polls
https://www.allsides.com/media-bias/media-bias-chart.

please make a report for the survey in the attached link and explain each readings
https://vrwozd2v2od.typeform.com/report/atyE5nFr/dXPvWEh5gpzp4VJJ

please make a report for the survey in the attached link and explain each readings
https://vrwozd2v2od.typeform.com/report/atyE5nFr/dXPvWEh5gpzp4VJJ

PYTHON ASSIGNMENT | AIC COMMISSION | SANCTION FOR USE OF AI GENERATION TEXT – NO CITATIONS | MBAN PROGRAM | DISMISSAL
This is my appeal to a 44% AI infraction that added to another academic infraction brings me to the dismissal from the program.
Refer to the documents uploaded!
I am submitting this appeal in the next 12H, However, I need to make the structure straightforward and clear. I am appealing for new evidence. In order to enhance the structure of the LETTER you must read the outcome as well as have a clear idea about academic integrity, business analytics, and AI Reports.
Please don’t change the contents but only enhance the structure by keeping my words and my way of speaking.
THE FOCUS OF THIS IS TO MAKE IT AS CLEAR, CONCISE, AND PROPERLY STRUCTURED AS PER FEEDBEEKS. IT HAS TO SHOW A STUDENT:
I NEED TO STRUCTURE IT IN A WAY THAT SHOWCASES THESE 3 POINTS:
1 FIRST AI CASE FOR ME
2. SHOW COMMITMENT TO LEARNING
3. AI USAGE –> TECHNICAL PART (IT REMAINS AT THE END OF THE APPEAL (TECHNICAL EXPLANATION IN BRIEF)
PLASE Use a sincere and personal tone. Avoid technical terms and overly formal language.
FEEDBACK MADE BY USING CHAT GPT:
Quick Proofreading Guide for the Appeal Letter
Context Understanding:
Familiarize yourself with the outcome letter and the basics of academic integrity related to business analytics and AI.
Key Focus Areas:
First AI Incident:
Clearly state at the beginning that this is your first issue involving AI in your studies.
Commitment to Learning:
Highlight specific actions you’ve taken to understand and ethically use AI.
Specific AI Usage:
Explain that AI was used mainly for text and did not significantly affect the core analytical content (80-90% of the assignment). Mention this at the end but summarize it in the executive summary.
Executive Summary:
Briefly mention the reason for the appeal and the new evidence.
Summarize your first encounter with AI issues, your efforts to learn, and how AI was used.
Technical Explanation:
Keep this part brief and at the end. Clarify that AI was used for text, not for the main analytical content.
Tone:
Use a sincere and personal tone. Avoid technical terms and overly formal language.
Structure:
Ensure each section flows logically. Use clear headers.
Remove any repetitive content.
Conclusion:
Conclude with a statement about learning from the experience and questioning the fairness of the penalty.

Hypothesis Testing Project
Due: Friday 5/10/24 at midnight.
This statistics project makes up 10% of the final course grade for MATH 14, Statistical
Methods. The purpose of the project is to give you hands-on statistical research
experience where you work with real data that you have collected.
PROJECT GUIDELINES
The project will be limited to hypothesis tests outlined in Chapter 8. This means that the
claim you will be testing will be related to a single population (not two populations as
described in Chapter 9).
After you choose the idea for your project, the basic steps will be:
1) Forming a research question and stating the question as a claim to be tested with
a hypothesis test.
Note: Your exact claim might be formed AFTER you collect the data and do
some preliminary analysis.
2) Collecting the appropriate data.
3) Calculating the various descriptive statistics necessary to describe the

___________________________________________________________________
Quantitative Methods (STAT-201)
Assignment 3: Excel QM (Social-Responsible)
2nd Semester, 1444-1445 (2023-2024)
Due date: 06 May 2024 (Time: 11:00 PM)
Student’s Name
Student’s ID
Section/CRN
Location
Marking Scheme
Question
Score
Obtained Score
Q-1
2
Q-2
2
Q-3
2
Q-4
2
Note: You are required to fill your full name, ID, and CRN.
Message: Social responsibility is a framework of ethics in which an individual collaborates and works with other organizations and individuals for the betterment of the community. There are numerous ways in which an organization can exhibit social responsibility; for instance, by promoting volunteerism, facilitating donations, employing ethical employment practices, and implementing environmental improvements. It introduces the subjective obligation that entails maintaining a delicate equilibrium between one’s ecosystem and the economy, as well as the potential compromises that may be made between economic progress and societal and environmental wellbeing. This transcends business organizations and affects all individuals whose actions influence the environment.
Solve the following questions using Excel QM. (2×4 = 8 marks)
Helping others through blood donation is a form of social solidarity or social responsibility. The blood donors cite a sense of social responsibility as their reason for donating blood, and as a result, the communities value and reward this activity. The following table shows the number of blood donors in a university from 2011–2023. Develop a 3-year moving average forecast and obtain the related statistical measures using excel QM.
University X has a unique on-campus dispensary that provides medical care. On a typical working day, patients arrive at the dispensary at an average rate of 2 patients per hour. There is one single nurse at the dispensary, and the average time required to give a consultation is 12 minutes.
Assume that you are a statistical consultant and want to provide a volunteer consultation to a start-up company as a social responsibility consultation. The company is planning to purchase a uniform outfit for their employees, and they obtained the following quantity discount table with three discount options:
To help needy people through charity is a form of social responsibility. The act of doing charity to help others is recognized and rewarded by all communities of the society. The following table shows the amount collected through charity and the amount spent on social development (in million dollars) in the last 8 years. Find the correlation and coefficient of determination for the given data and obtain the related statistical measures using excel QM.
year
Blood Donors
2011
116
2012
105
2013
146
2014
159
2015
108
2016
194
2017
227
2018
219
2019
234
2020
224
2021
248
2022
253
2023
265
2024
311
Solution:
It is assumed that the service times can be described by the exponential distribution, and the arrival process by a Poisson distribution. You are requested to find:
The average time in line,
The average number of patients in line,
The average time in the system,
The average number of patients in the system,
The probability that the dispensary is empty,
The utilization factor of the system.
Solution:
DISCOUNT NUMBER
DISCOUNT QUANTITY
DISCOUNT COST (SAR)
1
0 to 49
100
2
50 to 99
90
3
100 and over
85
Annual demand is 400 outfits, ordering cost is 50, and holding cost is 25% of the cost of the outfit. Use Excel QM to find the discount option with the minimum total cost.
Solution:
Year
Amount collected(y)
Amount spent(x)
1
18
15
2
14
10
3
12
9
4
15
12
5
10
5
6
8
4
7
9
6
8
6
3
Solution: