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

Which of the following normal distributions has the widest spread?

07/11/2020 Client: arwaabdullah Deadline: 3 days

1. (2 points) Which of the following are true about all normal distributions? Check all that apply

• A. They have one large tail. • B. They are bimodal. • C. They have no major outliers. • D. They are categorically sharp.

The z-score corresponding to an observed value of a variable tells you the number of standard deviations that the observation is from the mean

• A. True • B. False

A positive z-score indicates that the observation is • A. above the mean • B. below the mean

Answer(s) submitted: • • •

(incorrect)

2. (2 points) a) Fact: the region under the standard normal curve that lies to the left of −1.95 has area 0.0255881.

Without consulting a table or a calculator giving areas under the standard normal curve, determine the area under the stan- dard normal curve that lies to the right of 1.95. answer:

b) Which property of the standard normal curve allowed you to answer part a)?

• A. The total area under the curve is 1 • B. Almost all the area under the standard normal curve

lies between −3 and 3 • C. The standard normal curve is symmetric about 0 • D. The standard normal curve extends indefinitely in

both directions • E. None of the above

Answer(s) submitted: • •

(incorrect)

3. (2 points) What are the parameters for a normal curve? • A. the sample mean and sample standard deviation • B. the population mean and population variance • C. the population mean and population standard devia-

tion • D. the population median and population standard de-

viation • E. None of the above

Answer(s) submitted:

(incorrect)

4. (2 points) Which of the following normal distributions has the widest spread?

• A. A normal distribution with mean 0 and standard de- viation 2

• B. A normal distribution with mean 2 and standard de- viation 1

• C. A normal distribution with mean 1 and standard de- viation 3

• D. A normal distribution with mean 3 and standard de- viation 2

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

(incorrect)

5. (2 points) Consider two normal distributions, one with mean −19 and standard deviation 11, the other with mean 6 and standard deviation 11. Answer the following statements using true or false.

a) The two distributions have the same shape. answer:

b) The two distributions are centered at the same place. answer:

Answer(s) submitted:

• •

(incorrect)

1

6. (2 points) The U.S. Bureau of the Census conducts nation- wide sureys on characteristics of U.S. households.

Household size Relative Frequency 1 0.1 2 0.05 3 0.275 4 0.25 5 0.125 6 0.175 7 0.025

Total 1

a) Use the previous relative frequency distribution to obtain the percentage of U.S. households that are between sizes 3 and 5. answer:

b) Use your answer from part a) to estimate the area under the corresponding normal curve that lies between 3 and 5. answer:

Answer(s) submitted: • •

(incorrect)

7. (2 points) Length of skateboards in a skateshop are nor- mally distributed with a mean of 32 in and a standard deviation of 0.6 in. The figure below shows the distribution of the length of skateboards in a skateshop. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy. Answer:

Answer(s) submitted: •

(incorrect)

8. (2 points) Find the following probabilities for the standard normal random variable z:

(a) P(−1.83 ≤ z ≤ 0.78) =

(b) P(−0.8 ≤ z ≤ 0.37) =

(c) P(z ≤ 0.71) =

(d) P(z >−1.16) = Answer(s) submitted:

• • • •

(incorrect)

10. (2 points) Select True or False from each pull-down menu, depending on whether the corresponding statement is true or false.

? 1. Using the standard normal curve, the z−score repre- senting the 10th percentile is 1.28.

? 2. A random variable X is normally distributed with a mean of 150 and a variance of 36. Given that X = 120, its corresponding z− score is 5.0

? 3. The mean and standard deviation of an exponential ran- dom variable are equal to each other.

? 4. The mean and standard deviation of a normally dis- tributed random variable which has been standardized are one and zero, respectively.

Answer(s) submitted:

• • • •

(incorrect)

11. (2 points) Suppose that X is normally distributed with mean 95 and standard deviation 28.

A. What is the probability that X is greater than 147.08? Probability =

B. What value of X does only the top 15% exceed? X =

Answer(s) submitted:

• •

(incorrect)

13. (2 points) Suppose a car manufacturer believes its wind- screen wipers will last on average for three years on their cars if driven by a typical driver in the province. Moreover, the manu- facturer believes the lifetime of the wipers under such conditions is Normally distributed with a standard deviation of two years. Find the probability that, if on a car driven by a typical driver, a windscreen wiper lasts for a time that is not within 1.5 years of the mean lifetime.

The probability is: Answer(s) submitted:

• (incorrect)

2

14. (2 points) An exam consists of 42 multiple-choice ques- tions. Each question has a choice of five answers, only one of which is correct. For each correct answer, a candidate gets 1 mark, and no penalty is applied for getting an incorrect answer. A particular candidate answers each question purely by guess- work.

Using Normal approximation to Binomial distribution with continuity correction, what is the estimated probability this stu- dent obtains a score greater than or equal to 10? Please use R to obtain probabilities and keep at least 6 decimal places in intermediate steps.

• A. 0.4059 • B. 0.2089 • C. 0.6643 • D. 0.5650 • E. 0.3357

Answer(s) submitted: •

(incorrect)

15. (2 points) The shelf life of a battery produced by one ma- jor company is known to be Normally distributed, with a mean life of 4 years and a standard deviation of 0.6 years.

What value of shelf life do 16% of the battery shelf lives fall above? Round your answer to one decimal place.

Answer: years. Answer(s) submitted:

• (incorrect)

16. (2 points) Cans of regular Coke are labeled as containing 12 oz. Statistics students weighed the contents of 10 randomly chosen cans, and found the mean weight to be 12.11 ounces.

Assume that cans of Coke are filled so that the actual amounts are normally distributed with a mean of 12.00 oz and a standard

deviation of 0.11 oz. Find the probability that a sample of 10 cans will have a mean amount of at least 12.11 oz.

Answer(s) submitted:

(incorrect)

17. (2 points) Assume that the readings on the thermometers are normally idstributed with a mean of 0◦ and a standard devi- ation of 1.00◦C.

Find P60, the 60th percentile.

This is the temperature reading separating the bottom 60 % from the top 40 %.

Answer(s) submitted:

(incorrect)

18. (2 points) Healty people have body temperatures that are normally distributed with a mean of 98.20◦F and a standard deviation of 0.62◦F .

(a) If a healthy person is randomly selected, what is the probability that he or she has a temperature above 99.6◦F?

answer:

(b) A hospital wants to select a minimum temperature for requiring further medical tests. What should that temperature be, if we want only 1 % of healty people to exceed it?

answer: Answer(s) submitted:

• •

(incorrect)

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

3

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:

Smart Tutor
Writer Writer Name Offer Chat
Smart Tutor

ONLINE

Smart Tutor

Hi, After reviewing your project description, I understand well. I am a highly-skilled writer who has strong visual awareness, exemplary grammar and spelling knowledge, and the ability to analyze and modify. When it comes to missing links and correcting errors, look no farther. Without the need of any online rewriting tool I can turn your old content into a new and exciting piece of plagiarism free writing. Remember, your content could be a first impression. If you send out material that is riddled with misspellings, grammatical errors, and wrong information, you aren’t going to be presenting a good image of your business. Let’s get that content in tip-top shape today.

$60 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

Methods of real analysis goldberg solutions manual - Ucsd price center map - Ram 2500 tow capacity chart - Lps splash tv face reveal - 1 4 cup brown sugar nutrition - Investment spending by firms tends to fall during recessions - Story generator using vocab words - Pmol l to mmol l - What is interactive media authoring - Nursing care plan for homicidal ideation - Moral/Ethics and human behavior - Brick and timber house - 26/7 campbell street bundall - NURS521REPLYPROMPT1 - Parallax smart card reader - Prada ipo case analysis - Countries with autocracy based governments have - Psy 104 week 3 assignment - Wk 3 paper - Vcaa business management exam - Erich mendelsohn hat factory - Montserrat gcse case study - A joint venture is a _________ mode of foreign entry - Marketing strategy of dominos pdf - Ganger farm housing development - Dominant culture in organization - Father and child nightfall analysis - Normal consistency of cement lab report - Anchorage port stephens accommodation - English georgian floral arrangements - Haydn c major cello - Exploring microsoft excel 2016 comprehensive answer key - Critical thinking - Presented below are three independent situations - Year 8 reading comprehension - Circle of control worksheet - Cough focused assessment - Certificate iv property services - Chapters of the odyssey - How to write a historiography - Armstrong cheese factory ontario - A database at a college must support the following requirements - PA 1 Paper - Data Analysis & Business Intelligence - Aea maths grade boundaries - Touchstone in a sentence - Betta electrical victor harbour - Henna co produces and sells two products - The doubt of future foes analysis - Castor oil for tumors - Combustion equation of butane - Tina jones shadow health musculoskeletal objective data - Baddeley and hitch 1974 citation - Aws elasticsearch developer guide - For researcher_d - Electron transfer diagram worksheet - Discussion Help - The wizard of oz characters - Data Analytics - Good luck chinese soham - Photoelectron spectroscopy ap chemistry worksheet - Assignment: Assessing a Healthcare Program/Policy Evaluation - Coca cola target market - Fbga part marking decoder - Power point presentation by 09/26/2020 at 2:00 pm - Figures of speech used in the bible - NUR601 MODULE 6 DISCUSSION - Apa publication manual 6th edition - Defining the marketing research problem - Op-ed, modeled after an existing reputable online news site - Computer lab equipment list - How to find second minimum value in list python - Darwin's finch beak lab answer key - Discussion-APA Format - Developing an evaluation plan gcu - Analysis of a Pertinent Healthcare Issue - Linux raw socket example - How to report gps coordinates - Hog and sag calculation - Environmental Science - Case study - 5 point scale calming strategies - Convert 27 months to fortnights - Communicate with professor - Current in a circuit is directly proportional to - Determine the missing amounts in the following accounting equations - Qualitative Research - Jazz concert report sample - Dr mazhar qayyum eye specialist clinic - Steven b belkin - Data analysis plus 2016 - Promoting trust in the registered nurse-patient relationship - Rochester quadrajet throttle linkage - Calculus project - Divar default username and password - Cloud Computing - Hypervisors - What is repetition maximum - A rancher has 200 ft of fencing - Assignment #1: Research Specialty Care Paper .Rubric attached - Downs barracks fulda germany - Critical milestones in strategic planning