Posts tagged with statistics help online questions - Your Online Class Tutors

Posts tagged with statistics help online questions

Probability Question Example
The following question is a probability question for tossing a fair coin presented in Pearson My STATLAB statistics. Note that probability concepts are the building blocks for any introductory statistics course. To solve the problem, one would have to write down the possible outcomes, and associate each outcome with some probabilities.
Two fair coins are tossed​ (say a dime and a​ quarter). The two possible outcomes for a single coin are​ heads, h, and​ tails, t. Give each of the following.
​(a) the sample space
​(b) the probability of heads on the dime
​(c) the probability of heads on the quarter
​(d) the probability of getting both heads
​(e) the probability of getting the same outcome on both coins

Deliverable 5 - Hypothesis Tests for Two Samples item options
Assignment Content

Competency
Evaluate hypothesis tests for population parameters from two populations.

Dealing with Two Populations
Inferential statistics involves forming conclusions about a population parameter. We do so by constructing confidence intervals and testing claims about a population mean and other statistics. Typically, these methods deal with a sample from one population. We can extend the methods to situations involving two populations (and there are many such applications). This deliverable looks at two scenarios.

Concept being Studied
Your focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.

Student Success Criteria
View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

What to Submit
Your research and analysis should be presented on the spreadsheet provided.

Deliverable 5 - Hypothesis Tests for Two Samples.xlsx

In order to successfully complete this problem, one would need to use the seven hypothesis testing steps included in our other statistics-related assignment. The relevant files associated with this assignment have been attached to this post. A guide for completing this assignment have been prepared by our statistics assignment experts.

Hypothesis test for two samples example.docx

Assignment Content

Competency
Apply the normal distribution, standard normal distribution, and central limit theorem.

Student Success Criteria
View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

Scenario
Frank has only had a brief introduction to statistics when he was in high school 12 years ago, and that did not cover inferential statistics. He is not confident in his ability to answer some of the problems posed in the course.

As Frank's tutor, you need to provide Frank with guidance and instruction on a spreadsheet he has partially filled out. Your job is to help him understand and comprehend the material. You should not simply be providing him with an answer as this will not help when it comes time to take the test. Instead, you will be providing a step-by-step breakdown of the problems including an explanation on why you did each step and using proper terminology.

What to Submit
To complete this assignment, you must first download the spreadsheet, and then complete it by including the following items on the spreadsheet:

Deliverable 2 - Tutoring on the Normal Distribution.xlsx

Incorrect Answers - Correct any wrong answers. You must also explain the error performed in the problem in your own words.
Partially Finished Work - Complete any partially completed work. Make sure to provide step-by-step instructions including explanations.
Blank Questions - Show how to complete any blank questions by providing step-by-step instructions including explanations.
Your step-by-step breakdown of the problems, including explanations and calculations performed, should be present within the Excel spreadsheet provided.

My Course Tutor experts are good at providing academic assistance services to students at all academic levels. The contents included in the attached excel file have been listed below. You can download the excel file, and practice the calculations, or send as an email, or contact us via WhatsApp so we can provide you with a step to step solutions to your problem.

Instructions: The following questions on the next six tabs are shown to you by a student who is asking for help. Your job is to help the student walk through the problems by showing the student how to solve each problem in detail. You are expected to explain all of the steps in your own words.

Key:
This problem is an incorrect. Your job is to find the errors, correct the errors, and explain what they did wrong.
This problem is partially finished. You must complete the problem by showing all steps and explain your corrections.

This problem is blank. You must start from scratch and explain how you will approach the problem, how you solve it, and explain why you took each step.

Assume that a randomly selected subject is given a bone density test. Those tests follow a standard normal distribution. Find the probability that the bone density score for this subject is between -0.87 and 1.84.
 
Show your calculations using Excel functions in the area to the right of this text box and answer the problem with explanations below.

The U.S. Airforce requires that pilots have a height between 64 in. and 72 in. If women’s heights are normally distributed with a mean of 64.1 in. and a standard deviation of 2.31 in, find the percentage of women that meet the height requirement.

Show your calculations using Excel functions in the area to the right of this text box and answer the problem with explanations below.

Women’s pulse rates are normally distributed with a mean of 69.9 beats per minute and a standard deviation of 11.7 beats per minute. What is the z-score for a woman having a pulse rate of 63 beats per minute?
 
Student’s incorrect answer:

Let 𝒛 =(𝒙−𝝁)/𝝈
𝒛 =((𝟔𝟗.𝟗 − 𝟔𝟑))/(𝟏𝟏.𝟕)
 
𝒛 = 𝟎.𝟓𝟗

Identify where the student went wrong when solving the problem above. Show how to correctly calculate the answer using Excel in the area to the right of this text box. Finish the problem by stating how to correctly set up the problem and solve it below.

What is the cumulative area from the left under the curve for a z-score of -0.723? What is the area on the right of that z-score? Hint: You will have two answers (one for the left and one for the right).

Student’s partially finished answer:

The first part is to find the cumulative area from the left under the curve for a z-score of -0.723. This means that I need to find the probability that a z-score is less than -0.723.

Show your calculations using Excel functions in the area to the right of this text box and finish answering the problem with explanations below.

If the area under the standard normal distribution curve is 0.2343 from the right, what is the corresponding z-score?
 
Student’s incorrect answer:

We plug in “=NORM.S.INV(0.2343)” into Excel and get a z-score of -0.724.

Identify where the student went wrong when solving the problem above. Show how to correctly calculate the answer using Excel in the area to the right of this text box. Finish the problem by stating how to correctly set up the problem and solve it below.

A research shows that the Richter scale magnitudes of earthquakes are normally distributed with a mean of 1.533 and a standard deviation of 0.75. Earthquakes with magnitudes less than 2.00 are considered "microearthquakes" that humans do not feel. What percentage of earthquakes fall into this category?
 
Student’s partially finished answer:

We need to find the probability that earthquakes fall into the microearthquake category. The first step is to find the probability that the Richter scale is less than 2.00.

Show your calculations using Excel functions in the area to the right of this text box and finish answering the problem with explanations below.

Deliverable 2 - Tutoring on the Normal Distribution.xlsx

STA3215CBE Section 01CBE Inferential Statistics and Analytics (11 Weeks) - CBE Online Course - 2022 Summer Quarter
Deliverable 1 assignment

Deliverable 1 - Descriptive Statistics

Assignment Content

Competency

Describe the data using the measures of central tendency and measures of variability.

Student Success Criteria

View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

Instructions

Scenario (information repeated for deliverable 01, 03, and 04)

A major client of your company is interested in the salary distributions of jobs in the state of Minnesota that range from $30,000 to $200,000 per year. As a Business Analyst, your boss asks you to research and analyze the salary distributions. You are given a spreadsheet that contains the following information:

A listing of the jobs by title
The salary (in dollars) for each job

To complete Deliverable 1 assignment - Descriptive Statistics.xlsx file for specific questions that need to be answered in this deliverable.

The client needs the preliminary findings by the end of the day. Your boss asks you to first compute some basic statistics and then analyze the results in the four questions given in the Excel spreadsheet.

Background information on the Data

The data set in the spreadsheet consists of 364 records that you will be analyzing from the Bureau of Labor Statistics. The data set contains a listing of several jobs titles with yearly salaries ranging from approximately $30,000 to $200,000 for the state of Minnesota.

What to Submit

Your boss wants you to submit the spreadsheet with the completed calculations, answers, and analysis.
The following questions are include in the attached excel file.

Notepad
. Provide a brief overview of the scenario you are given and describe the data set.
1b. Describe how you will be analyzing the data set.
1c. List all variables in the data set. Define each variable as follows and explain your reasoning.
i. Provide the two variable names in the data set.

ii. Define both variable as either Quantitative or Qualitative. Explain your answers.

iii. For the quantiative variable listed, define them as either Discrete or Continuous. Explain your answer.
iv. Provide the level of measurement for both variables. Explain your answers.

  1. Name and describe each Measure of Center below. Include the advantages and disadvantages of each Measure of Center.
    4a. Calculate the Measures of Center and Measures of Variation on the "Data" tab in this document.
    Under each measurement, provide the following: the calculation (including the Excel formula), the value, the units of measurement, and an interpretation of the calculation in context of the scenario.

i. Mean

ii. Median

iii. Mode

iv. Midrange

v. Range

vi. Variance

vii. Standard Deviation
If you find any difficulty completing analyses for this project, you can contact My Course Tutor for help. We provide statistics and data analysis services under our statistics assignment help category. You might also wish to engage our experts on free consultations on how to go about analyzing your project data using excel.

Deliverable 1 - Descriptive Statistics.xlsx