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

Z score for 97 confidence interval

11/11/2021 Client: muhammad11 Deadline: 2 Day

1. (2 points) Two random samples are selected from two independent pop-

ulations. A summary of the samples sizes, sample means, and sample standard deviations is given below:

n1 = 37, x̄1 = 52.4, s1 = 5.8 n2 = 48, x̄2 = 75, s2 = 10

Find a 92.5% confidence interval for the difference µ1− µ2 of the means, assuming equal population variances.

Confidence Interval = Answer(s) submitted:

(incorrect)

2. (2 points) In order to compare the means of two popu- lations, independent random samples of 238 observations are selected from each population, with the following results:

Sample 1 Sample 2 x1 = 1 x2 = 3

s1 = 120 s2 = 200

(a) Use a 97 % confidence interval to estimate the difference between the population means (µ1−µ2).

≤ (µ1−µ2)≤ (b) Test the null hypothesis: H0 : (µ1− µ2) = 0 versus the al- ternative hypothesis: Ha : (µ1− µ2) 6= 0. Using α = 0.03, give the following:

(i) the test statistic z = (ii) the positive critical z score (iii) the negative critical z score The final conclustion is

• A. We can reject the null hypothesis that (µ1−µ2) = 0 and accept that (µ1−µ2) 6= 0. • B. There is not sufficient evidence to reject the null hy-

pothesis that (µ1−µ2) = 0.

(c) Test the null hypothesis: H0 : (µ1−µ2) = 26 versus the al- ternative hypothesis: Ha : (µ1−µ2) 6= 26. Using α = 0.03, give the following:

(i) the test statistic z = (ii) the positive critical z score (iii) the negative critical z score The final conclustion is

• A. We can reject the null hypothesis that (µ1−µ2) = 26 and accept that (µ1−µ2) 6= 26. • B. There is not sufficient evidence to reject the null hy-

pothesis that (µ1−µ2) = 26.

Answer(s) submitted:

• • • • • • • • • •

(incorrect)

3. (2 points) Two independent samples have been selected, 70 observations from population 1 and 83 observations from population 2. The sample means have been calculated to be x1 = 14.9 and x2 = 10.5. From previous experience with these populations, it is known that the variances are σ21 = 20 and σ22 = 21.

(a) Find σ(x1−x2). answer:

(b) Determine the rejection region for the test of H0 : (µ1−µ2) = 2.92 and Ha : (µ1−µ2)> 2.92 Use α = 0.05. z >

(c) Compute the test statistic. z =

The final conclustion is

• A. We can reject the null hypothesis that (µ1− µ2) = 2.92 and accept that (µ1−µ2)> 2.92. • B. There is not sufficient evidence to reject the null hy-

pothesis that (µ1−µ2) = 2.92. (d) Construct a 95 % confidence interval for (µ1−µ2).

≤ (µ1−µ2)≤ Answer(s) submitted:

• • • • • •

(incorrect)

4. (2 points) Randomly selected 100 student cars have ages with a mean of 7.2 years and a standard deviation of 3.4 years, while randomly selected 85 faculty cars have ages with a mean of 5.4 years and a standard deviation of 3.3 years.

1

1. Use a 0.01 significance level to test the claim that student cars are older than faculty cars.

The test statistic is

The critical value is

Is there sufficient evidence to support the claim that student cars are older than faculty cars?

• A. Yes • B. No

2. Construct a 99% confidence interval estimate of the dif- ference µ1−µ2, where µ1 is the mean age of student cars and µ2 is the mean age of faculty cars.

< (µ1−µ2)< Answer(s) submitted: • • • • •

(incorrect)

5. (2 points) Randomly selected 15 student cars have ages with a mean of 7.9 years and a standard deviation of 3.4 years, while randomly selected 14 faculty cars have ages with a mean of 5.5 years and a standard deviation of 3.3 years.

1. Use a 0.05 significance level to test the claim that student cars are older than faculty cars.

(a) The test statistic is (b) The critical value is (c) Is there sufficient evidence to support the claim that stu-

dent cars are older than faculty cars?

• A. Yes • B. No

2. Construct a 95% confidence interval estimate of the dif- ference µs−µ f , where µs is the mean age of student cars and µ f is the mean age of faculty cars.

< (µs−µ f )< Answer(s) submitted: • • • • •

(incorrect)

7. (2 points) In which of the following scenarios will con- ducting a two-sample t-test for means be appropriate? CHECK ALL THAT APPLY.

• A. To test if the proportion of low-income families is higher than that of high-income families in British Columbia.

• B. To test if there is a difference between the mean an- nual income of husbands and that of wives in Canada.

• C. To test if the mean annual income of Ontarians is higher than that of British Columbians.

• D. To test if there is a difference between the propor- tion of low-income families in British Columbia and a known national proportion.

• E. To test if there is a difference between the mean annual income of male British Columbians and that of female British Columbians.

• F. To test if there is a difference between the mean annual income of British Columbians and a known na- tional mean.

• G. None of the above Answer(s) submitted: •

(incorrect)

Generated by c©WeBWorK, http://webwork.maa.org, Mathematical Association of America

2

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:

Homework Tutor
Engineering Guru
Exam Attempter
Pro Writer
WRITING LAND
Isabella K.
Writer Writer Name Offer Chat
Homework Tutor

ONLINE

Homework Tutor

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$28 Chat With Writer
Engineering Guru

ONLINE

Engineering Guru

I find your project quite stimulating and related to my profession. I can surely contribute you with your project.

$22 Chat With Writer
Exam Attempter

ONLINE

Exam Attempter

I have assisted scholars, business persons, startups, entrepreneurs, marketers, managers etc in their, pitches, presentations, market research, business plans etc.

$48 Chat With Writer
Pro Writer

ONLINE

Pro Writer

I have done dissertations, thesis, reports related to these topics, and I cover all the CHAPTERS accordingly and provide proper updates on the project.

$25 Chat With Writer
WRITING LAND

ONLINE

WRITING LAND

I have done dissertations, thesis, reports related to these topics, and I cover all the CHAPTERS accordingly and provide proper updates on the project.

$27 Chat With Writer
Isabella K.

ONLINE

Isabella K.

I have read your project details and I can provide you QUALITY WORK within your given timeline and budget.

$38 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

Ban zhao lessons for women - Response the questions - Ford fiesta case study pdf - Circular saw noise level - Using effective communication to identify client needs and expectations - The decimal 132.64 written in expanded form is - De - Dave presidential movie worksheet answers - An income statement organized by cost behavior does not include - English - Kennel attendant job description - Mcgraw hill marketing simulation answers - Robin hood case analysis answers - Research assignment - Diffraction grating experiment observation table - Survival analysis techniques for censored and truncated data solution - What are common mythemes in myths and legends - What is uranus distance from the sun - What does the great gatsby say about the american dream - How to make a food web project - Select the guiding questions of reader response criticism - Where do the dunphys live - Simplify the expression 2 5i 1 5i - Robert billings the wave - Rock cycle fill in the blank worksheet and answers - One liter to milliliters - Private Security Industry - The book thief images - Capella project management - The following tabulations are actual sales of units - Butl_ Learnign Feamework - Marketing - Which type of variance causes operating income to be greater than the budgeted operating income? - St augustines primary school wodonga - An insurance company checks police records on accidents - 100 deadlifts a day - Abbies takeaway pendle hill - 0 - A tiger leaps horizontally from a - Gilded cages r phoenix epub - Week 1 CS quiz - Vending machine coin acceptor - The not so wonderful world of eurodisney summary - Australian fire extinguisher chart - Jamun fruit wine recipe - Lagaan once upon a time in india worksheet - The passion of new eve sparknotes - Building goodwill is important to converting new customers to committed lifetime customers. - Humanistic, Transpersonal and Existential Psychology - Crush step 1 errata - Describe the transformation of the graph calculator - M company granted 90000 stock options - Certificate laerdal com certificate aspx - Dell precision tower 7910 xcto base - Pathological Conditions in Older Adults - What is a nursing practice problem - Aflac mission statement - Castlemilk high school address - The greek marketplace where philosophy was debated was called - Egypt the gift of the nile summary - Schoolwide enrichment model reading - I Need a ( 4500 words) on Ebook Description About Vegetarian Diet - MBA 599 - ORGANIZATION RECOMMENDATIONS - 200 words disscusion - Assessment Plan - Answer 4 questions about Film Reading Materials - Surface area of oblique pyramid - What is the difference between intervention research and systems research - Columbia space shuttle disaster case study - Week 8 - Cultures - St george term deposit interest - Unimail hud ac uk - Relational data model ppt - Hegel philosophy of right stanford - We still live here full movie - Week 5 Report - Define ideal solution in chemistry - What is the vapor pressure of acetone - Voith turbo coupling pdf - Mars inc marketing strategy - Atkins or fadkins answers part 1 - Lincoln elementary white bear lake - Refer to figure 4-9. in this market, equilibrium price and quantity, respectively, are - Dichromate chromate equilibrium - Felician brightspace - SOCW 6111 - What is a grand nursing theory - Othello and emilia affair - Enhance Viewers Perception - Advantages and disadvantages of the corporate form of business - American history x danny essay - Public speaking courses parramatta - 30 powerful visualization practices pdf - Ethical Stories - US elections - Blackboard old westbury - Problem 6 3a perpetual alternative cost flows lo p1 - Chiharu shiota infinity lines - Example of a preliminary investigation report - Case Study on Death and Dying