# stat

## stat

Do Not Copy. Order Custom, Original Paper.

1

Marks: 1

W4-01. Suppose x is a random variable best described by a uniform probability distribution with c EQUAL 30 and d EQUAL 90. Find P(30 â‰¤ x â‰¤ 45).

a. 0.15

b. 0.35

c. 0.25

d. 0.025

Question 2

Marks: 1

W4-12. Which geometric shape is used to represent areas for a uniform distribution?

a. Rectangle

b. Triangle

c. Bell curve

d. Circle

Question 3

Marks: 1

W4-17. Find a value of the standard normal random variable z, called z0, such that P(-z0â‰¤ z â‰¤ z0) EQUAL 0.98.

a. 2.33

b. 1.96

c. .99

d. 1.645

Question 4

Marks: 1

W4-03. Suppose x is a random variable best described by a uniform probability distribution with c EQUAL 20 and d EQUAL 60. Find P(x > 60).

a. 0.4

b. 0.5

c. 1

d. 0

Question 5

Marks: 1

W4-02. Suppose x is a random variable best described by a uniform probability distribution with c EQUAL 10 and d EQUAL 90. Find P(x < 42).

a. 0.04

b. 0.5

c. 0.4

d. 0.32

Question 6

Marks: 1

W4-20. A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 325 seconds.

a. .0107

b. .4893

c. .5107

d. .9893

Question 7

Marks: 1

W4-08. The diameters of ball bearings produced in a manufacturing process can be described using a uniform distribution over the interval 3.5 to 5.5 millimeters. What is the probability that a randomly selected ball bearing has a diameter greater than 4.6 millimeters?

a. 2

b. 0.8364

c. 0.5111

d. 0.45

Question 8

Marks: 1

W4-06. Suppose x is a random variable best described by a uniform probability distribution with c EQUAL 3 and d EQUAL 9. Find the value of a that makes the following probability statement true: P(3.5 â‰¤ x â‰¤ EQUAL 0.5.

a. 6.5

b. 6

c. 4

d. 1.2

Question 9

Marks: 1

W4-07. High temperatures in a certain city for the month of August follow a uniform distribution over the interval 68Â°F to 90Â°F. What is the probability that the high temperature on a day in August exceeds 73Â°F?

a. 0.0455

b. 0.2273

c. 0.462

d. 0.7727

Question 10

Marks: 1

W4-05. Suppose x is a random variable best described by a uniform probability distribution with c EQUAL 3 and d EQUAL 5. Find the value of a THAT makes the following probability statement true: P(x â‰¤ EQUAL 0.75.

a. 4.7

b. 4.5

c. 3.5

d. 1.5

Question 11

Marks: 1

W4-19. For a standard normal random variable, find the probability that z exceeds the value -1.65.

a. 0.5495

b. 0.4505

c. 0.0495

d. 0.9505

Question 12

Marks: 1

W4-13. Suppose x is a uniform random variable with c EQUAL 40 and d EQUAL 70. Find the standard deviation of x.

a. Ïƒ EQUAL 3.03

b. Ïƒ EQUAL 1.58

c. Ïƒ EQUAL 8.66

d. Ïƒ EQUAL 31.75

Question 13

Marks: 1

W4-09. A machine is set to pump cleanser into a process at the rate of 7 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 6.5 to 9.5 gallons per minute. What is the probability that at the time the machine is checked it is pumping more than 8.0 gallons per minute?

a. .50

b. .25

c. .7692

d. .667

Question 14

Marks: 1

W4-15. After a particular heavy snowstorm, the depth of snow reported in a mountain village followed a uniform distribution over the interval from 15 to 22 inches of snow. Find the standard deviation of the snowfall amounts.

a. 1.42 inches

b. 18.5 inches

c. 2.02 inches

d. 4.08 inches

Question 15

Marks: 1

W4-11. The age of customers at a local hardware store follows a uniform distribution over the interval from 18 to 60 years old. Find the probability that the next customer who walks through the door exceeds 50 years old. Round to the nearest ten-thousandth.

a. 0.3600

b. 0.7619

c. 0.8333

d. 0.2381

Question 16

Marks: 1

W4-14. Suppose a uniform random variable can be used to describe the outcome of an experiment with outcomes ranging from 30 to 80. What is the mean outcome of this experiment?

a. 55

b. 30

c. 80

d. 60

Question 17

Marks: 1

W4-16. Use the standard normal distribution to find P(-2.25 < z < 0).

a. .5122

b. .4878

c. .6831

d. .0122

Question 18

Marks: 1

W4-10. A machine is set to pump cleanser into a process at the rate of 9 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 8.5 to 11.5 gallons per minute. Find the probability that between 9.0 gallons and 10.0 gallons are pumped during a randomly selected minute.

a. 0

b. 0.33

c. 1

d. 0.67

Question 19

Marks: 1

W4-04. Suppose x is a uniform random variable with c EQUAL 20 and d EQUAL 60. Find P(x > 44).

a. 0.4

b. 0.9

c. 0.6

d. 0.1

Question 20

Marks: 1

W4-18. Find a value of the standard normal random variable z, called z0, such that P(z â‰¤ z0) EQUAL 0.70.

a. .47

b. .98

c. .53

d. .81

• StudyAcer

4.7/5
• Trustpilot

4.6/5
• Sitejabber

4.6/5

Need help with writing stat?

Dr.JamesPhD

Rating: 4.9/5    Reviews 373

Success rate 98%

Completed projects: 592

Hello, I am a full-time professional freelance writer with over 6 years experience in academic writing. I have a PhD in Strategic Management and have done several projects in business management, marketing and other subjects. This experience has helped me reinforce my ability to work in various fields and handle simple and complex topics. I am a...

Dr.SUCCESS

Rating: 5/5    Reviews 1326

Success rate 100%

Completed projects: 1976

Hello :) My name is Dr.Success, I've started on my path as a professional writer mostly by writing essays. However, in the years since then, I've written various other academic papers, from research works to book reviews. From Sydney to New York, there are hundreds of students all over the world that are happy with the services I've provided the...

MarvellousTutor

Rating: 5/5    Reviews 371

Success rate 99%

Completed projects: 1173

Hi there! Im MarvellousTutor, your perfect author with huge writing experience in English, Art and Business. What? Need assignment on another subject? No worries: I can deal with anything! If you're dreaming of the reliable, responsible and always-on-time writer, here I am! I manage my time greatly, thus, your deadline is highly important for me...

Prof_Stephen

Rating: 4.7/5    Reviews 891

Success rate 96%

Completed projects: 1136

Hello there! My name is Prof Stephen. I have been a full-time freelance researcher and writer for a period of over 6 years. I have successfully completed over 1000 projects and assignments. I have had a good professional relationship with my clients who always come back for more quality papers since I highly value quality, professionalism, and i...

Prof.TzKelly

Rating: 4.9/5    Reviews 244

Success rate 99%

Completed projects: 479

I'm ProfTzKelly, talented wordsmith, grammar afficionado, and writing machine. I'm written everything from outlines to screenplays and book reviews to advanced research papers. All you have to do to be well on your way to a great grade is chat with me! I'm experienced in all major styles, including APA, MLA, Chicago, Harvard, and Vancouver. You ...

ProfAcer

Rating: 5/5    Reviews 465

Success rate 96%

Completed projects: 852

Hey! My name is ProfAcer, and my goal is to help you to get through a tough period of your life. I've been a student, and I know that the amount of work some professors expect you to do can be unfair and overwhelming. And that's without even accounting for the job you probably have an active social life each student should have. There is no sham...

ProfessorEunice

Rating: 4.9/5    Reviews 412

Success rate 97%

Completed projects: 719

In academic writing, quality, originality, and deadlines are vital, and these are my primary offerings to all my clients. I have two years of experience as a full-time academic writer, with over 300 finance, economics, marketing, business, and general papers written from scratch. Since joining this site, I have also tackled sociology, healthcare...

ProfWriters

Rating: 5/5    Reviews 482

Success rate 97%

Completed projects: 783

Hello, I am Prof Writers, I am a bold, accurate, and experienced tutor committed to providing clients with high quality, original, and timely work. As a writer, proficiency in several disciplines in academic writing is necessary, and that is why I prioritize on delivering quality and appropriate work. Be assured that I will always follow the lai...

Think_Tank

Rating: 4.8/5    Reviews 319

Success rate 96%

Completed projects: 584

Hello! People call me ThinkTank, and I've been earning money as an academic writer for years. With a lot of works under my belt, you can bet that I've dealt with dozens of various topics and different forms of papers, including essays, research papers, and even dissertations. I like the challenge that comes with this job. I first fell in love wi...