Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

C++ dictionary

26/03/2021 Client: saad24vbs Deadline: 2 Day

LAB SESSION 3

ANALYZING MEAN

INTRODUCTION: Two indispensable statistical decision-making tools for a single

parameter are

(i) Confidence intervals

(ii) Hypothesis tests to investigate theories about parameters.

KNOWN SIGMA

CONFIDENCE INTERVALS

As an introduction, let’s follow Example 8.4 in your text.

image1.png image2.png

Begin a new worksheet and generate 40 random integers the range 0 to 9 in column A. Use the Random Number Generation tool of Excel and then use the INT (integer) function to transform to integers in the range 0 to 9:

Choose: Data > Data Analysis > Random Number Generation > OK

Enter: Number of Variables: 1

Number of Random Numbers: 40

Select: Distribution: Uniform

Enter: Parameters, Between 0 and 10

Output Range: B1 > OK

Enter: in cell A1: =INT(B1)

Click and drag: lower right corner to cell A40

To see the mean, standard deviation and maximum and minimum values for the data set use: Select: Data > Data Analysis > Descriptive Statistics > OK

Enter input and output range as appropriate, and select Summary Statistics

Find the 90% confidence interval for the mean of these values we generate in column A: Choose: Data > Data Analysis Plus** > Z-Estimate: Mean > OK

Enter: Input Range: A1:A40

Standard Deviation (SIGMA): 2.87 > OK

Alpha: .10 > OK

So the 90% confidence interval for the mean is image3.jpg to image4.jpg . ** If “Data Analysis Plus” does not show on the File menu:

Save and Close your excel file

Open: http://www.kellerstatistics.com/KellerStatistics/DataAnalysisPlus Click on: “Download DAPv9” bottom (Mac or Windows)

Save the file > Extract it > open it > double click on Excel file:“Stats_2007-2013_v9b” > Click on “Enable Macros” > Find “Data Analysis Plus” in “Add-Ins” at the menu toolbar of present Excel file > Reopen your previous excel file by dragging inside of present Excel file.

HYPOTHESIS TESTING

A standard final examination in an elementary statistics course is designed to produce a mean score of 75 and a standard deviation of 12. The hypothesis you will try to verify is: "This particular statistics class is above average." At the .05 level of significance, test the claim that the following sample scores reflect an above-average class (assuming sigma = 12):

79 79 78 74 82 89 74 75 78 73 74 84 82 66 84 82 82 71 72 83

Test the hypothesis, "The mean test grade for this class is greater than 75." Choose: Add-Ins > Data Analysis Plus > Z-Test: Mean > OK

Enter: Input Range: A1:A20 or select cells > OK

Hypothesized mean: 75

Standard Deviation (SIGMA): 12 > OK

Alpha: .05 > OK

Questions:

1. What are the formal null and alternative hypotheses?

2. What is the value of the test statistic, and what is your decision? Is the mean of this class above “average”?

UNKNOWN SIGMA

THE CONFIDENCE INTERVAL

To generate a confidence interval using the t-statistic we use Inference about a Mean command, specifying the level of confidence and the column of data for which the estimation is being made.

image5.png

Consider the data presented in exercise 9.31[EX09-031] of your text. Open the data file. Before we complete a 95% confidence interval estimate for the mean length of lunch breaks

at Giant Mart, we check the normal probability plot and boxplot to verify the normality assumption.

Excel uses a test for normality (Chi-Squared Test of Normality), not the probability plot. Choose: Add-Ins > Data Analysis Plus > Chi-Squared Test of Normality > OK

Enter: Input Range: select cells

Select: Labels (if column heading was used) > OK

** IF P-value greater the .05, given distribution is approximately normal.

To complete a 95% confidence interval estimate for the mean length of lunch breaks at Giant Mart complete the following steps:

Choose: Add-Ins > Data Analysis Plus > t-Estimate: Mean > OK

Enter: Input Range: A1:A22

Enter: Alpha: .05 > OK

With 95% confidence we estimate the mean length of lunch breaks at Giant Mart to be between image6.jpg and image7.jpg minutes.

THE T TEST

image8.png

Using text exercise 9.29 [EX02-177] as the basis of our discussion, open the data file. Suppose we have been asked to determine whether this accelerator has decreased the drying time by significantly more than 4% at the 0.01 level.

To perform the test, use the following commands:

Choose: Add-Ins > Data Analysis Plus > t-Test Mean > OK

Enter: Input Range: A2:A9 > OK

Hypothesized mean: 4 Alpha: 0.01 > OK

Question:

3. What are the formal null and alternative hypotheses?

4. Is there sufficient evidence to show that this accelerator has decreased the drying time significantly more than 4% at the .01 level?

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Math Specialist
A Grade Exams
University Coursework Help
Financial Solutions Provider
Quality Assignments
Chartered Accountant
Writer Writer Name Offer Chat
Math Specialist

ONLINE

Math Specialist

I am known as Unrivaled Quality, Written to Standard, providing Plagiarism-free woork, and Always on Time

$52 Chat With Writer
A Grade Exams

ONLINE

A Grade Exams

I will cover all the points which you have mentioned in your project details.

$56 Chat With Writer
University Coursework Help

ONLINE

University Coursework Help

I am known as Unrivaled Quality, Written to Standard, providing Plagiarism-free woork, and Always on Time

$28 Chat With Writer
Financial Solutions Provider

ONLINE

Financial Solutions Provider

I am known as Unrivaled Quality, Written to Standard, providing Plagiarism-free woork, and Always on Time

$63 Chat With Writer
Quality Assignments

ONLINE

Quality Assignments

I have read your project details. I can do this within your deadline.

$51 Chat With Writer
Chartered Accountant

ONLINE

Chartered Accountant

You can award me any time as I am ready to start your project curiously. Waiting for your positive response. Thank you!

$65 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Organizational theory design and change chapter 1 - Sua packet 9th edition - What role does creativity play in the bat poet - What is relation between molarity and molality - Hard and soft engineering - Health promotion model nursing theory - What is istat chem 8 - Renewable and non renewable resources activity - Jeff nippard full body program pdf - Bankwest children's savings account - Interpreting a food web worksheet answers environmental science - War and Modernity - Testout 4.4 6 - Distribution channel adopted by avon - Lyle lanley costume - How to lodge tfn declaration online - Ancient egypt vocabulary list - COLLABORATIVE LEARNING COMMUNITY - The lovesong of j alfred prufrock explanation - Wheelock's latin self tutorial exercises - Single phase distribution transformer connections - Practicum – Week 5 Journal Entry - Glycogen starch and cellulose are - Educational technology - List a medical term linking a word root + suffix - Why might you use a perception check - Purple heart drop off locations maryland - Cbr has weaker intermolecular forces than ccl - Week9 health project 430 - Carbon dioxide and limewater - Full sentence outline apa format examples - Why america is self segregating they say i say - Flinders university bachelor of arts - Mason paper company manufactures commodity - What does nlgi stand for - Trends and issues in tourism and hospitality industry - Ethically - Stopping by woods on a snowy evening pdf - Monash law summer unit - Sara lee croissants discontinued - Jimmy's casino shuttles foley al - 2h2 o2 2h2o in words - History essay three pages double spaced - How would you characterize chiquita's historical approach to global management - Mechanism of preparation of m nitrobenzoic acid from methyl benzoate - Aristotle book 2 nicomachean ethics - Horror genre conventions list - Which two learning processes seem to be opposites - For one more day study guide answers - The gettysburg address multiple choice questions answers - Stream morphology - Confessions of a starving artist - Jorgansen lighting inc. manufactures heavy-duty - What is case mix index - Address and postcode finder new zealand - COVID-19: A Case Study in Effective Women's Leadership - Crystal east morong rizal pathland - Clinical Pharmacology - Aura city of colour master plan - Dr bret scher wikipedia - ADVANCED WIRTING - World War 2 - Sop for masters in global management - Ad sras lras graph - Lord i need you matt maher - A person has a reasonable chance of surviving - Grapes of wrath text - Aoa network diagram - Edict of milan 313 - Asahi beverages graduate program - Ib online curriculum centre - Pete's classic car sales - Travis perkins credit control - Ol 421 final project swot - Aesthetic qualities studio art - Oliver cromwell relationship with parliament - Introduction to management john r schermerhorn pdf - Khan academy financial statement analysis - Assignment lab 3 - Action camera market share 2016 - Pacific breakers bribie island - Building society reference number - Salesmanship - Week 1 discussion 2 - Public law - Neo hubber nasal bebes - Audit of liabilities problems and solutions - Book report cover page - • What key financial ratios will be affected by the adoption of FAS 141R and FAS 160? What will be the likely effect? - Res Week - The goal - Discussion post - Ability to work in a team environment selection criteria examples - Download the file below - Ben and jerry's balance sheet - Book pte exam brisbane - Breach Analysis - Yao x 2000 an introduction to confucianism cambridge university press - Halle berry dad and mom - Dot matrix led display circuit diagram 8 32