Calculus and Above

# In a survey of 616 males ages 18-64, 392 say they have

Customer Question
In a survey of 616 males ages...
In a survey of
616
males ages 18-64,
392
say they have gone to the dentist in the past year.
Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.
Submitted: 2 years ago.Category: Calculus and Above
Show More
Show Less
6/18/2015
Tutor: Ashok Kumar, Electrical Engineer replied 2 years ago
Ashok Kumar, Electrical Engineer
Category: Calculus and Above
Satisfied Customers: 3,143
Experience: Masters Degree in Electrical Engineering
Verified
Thanks for using Justanswer.com. I will solve these questions.
Kindly inform when this is due.
Customer reply replied 2 years ago
2 hrs
Tutor: Ashok Kumar, Electrical Engineer replied 2 years ago
Here p = 392/616 = 0.6363
standard deviation = sqrt[p(1-p)/n]
= sqrt(0.6363*0.3636/616)
= 0.01938
Confidence interval: p±z*standard deviation
For 90% confidence interval, z = 1.645
Hence, 90% confidence interval: (0.6363±1.645*0.01938)
: (0.6044, 0.6682)
For 95% confidence interval, z = 1.96
Hence, 95% confidence interval: (0.6363±1.96*0.01938)
: (0.5983, 0.6743)
90% confidence interval means that 90 times out of 100, the probability will be between 0.6044 and 0.6682. Similarly 95% confidence means.
95% confidence interval is wider.
Tutor: Ashok Kumar, Electrical Engineer replied 2 years ago
Kindly rate the answers if no clarification is needed.
Ashok Kumar, Electrical Engineer
Category: Calculus and Above
Satisfied Customers: 3,143
3,143 Satisfied Customers
Experience: Masters Degree in Electrical Engineering

Ashok Kumar is online now

A new question is answered every 9 seconds

• Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
• Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

## What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

## Meet the Experts:

SusanAthena

Master's Degree

102 satisfied customers

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

Mr. Gregory White

Master's Degree

99 satisfied customers

M.A., M.S. Education / Educational Administration

Dr Arthur Rubin

Doctoral Degree

58 satisfied customers

Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers

JACUSTOMER-yrynbdjl-

Master's Degree

42 satisfied customers

I have a MS in Mathematics and I have taught Mathematics for 10 years at the college level.

dhouse1940

Master's Degree

33 satisfied customers

BS mathematics, MS biostatistics, 35+ yrs designing & analyzing biological experiments.

Don

Master's Degree

29 satisfied customers

M.S. Astronautical Engineering. Math/Sci/Comp Tutor

mhasan420

Master's Degree

15 satisfied customers

BA Maths, Oxford

< Previous | Next >

Related Calculus and Above Questions
I need help with my economics statistics homework. It is
I need help with my economics statistics homework. It is about confidence intervals. Thank you!… read more
GLENN
Master of Mathematics
369 satisfied customers
I conducted a logistic regression analysis. My Chair asked
I conducted a logistic regression analysis. My Chair asked me to add the regression equation. I will include the chartTable 6 Logistic Regression: Predicting Incarceration Variable Beta coefficient Wa… read more
GLENN
Master of Mathematics
369 satisfied customers
I have a lot of trouble with finding correlation by adding
Hi, I have a lot of trouble with finding correlation by adding n=15 two points to each of X values. There are n=15 pairs of X and Y values with Pearson correlation of r=0.40 … read more
Ashok Kumar
Electrical Engineer
3,143 satisfied customers
I need to solve those two problems for Statistics. Questions
I need to solve those two problems for Statistics. Questions 1, and question 2 … read more
GLENN
Master of Mathematics
369 satisfied customers
The total cholesterol levels of a sample of men aged​ 35-44
The total cholesterol levels of a sample of men aged​ 35-44 are normally distributed with a mean of 225225 milligrams per deciliter and a standard deviation of 38.838.8 milligrams per deciliter.​(a) W… read more
Bachelor of Education
Looking at the winemaker question and am wondering if I came
Looking at the winemaker question and am wondering if I came to the correct solution … read more
GLENN
Master of Mathematics
369 satisfied customers
Can you help me with these questions, they are stats
well, I need these answers asap. can you help they are the exact questions on the grid… read more
GLENN
Master of Mathematics
369 satisfied customers
According to a report by the US Fish and Wildlife Service,
According to a report by the US Fish and Wildlife Service, the mean length of six-year-old rainbow trout in the Arolic River in Alaska is 481 millimeters with a standard deviation of 41 millimeters. A… read more
Ryan
Bachelor\u0027s Degree
1,060 satisfied customers
I am really struggling with some of my economics stats
Hi! I am really struggling with some of my economics stats homework. Can you help me? Here is the question: A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 3… read more
GLENN
Master of Mathematics
369 satisfied customers
I'm working on a statistics problem that I don't
Hi, I'm working on a statistics problem that I don't understand... In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with a mean of 67.7 inches and a stan… read more
GLENN
Master of Mathematics
369 satisfied customers
According to a​ study, brain weights of men in country A are
According to a​ study, brain weights of men in country A are normally distributed with mean 1.371.37 kg and standard deviation 0.160.16 kg. Apply the empirical rule to complete each sentence. Complete… read more
GLENN
Master of Mathematics
369 satisfied customers
I'm taking a statistics quiz. I've taken this quiz 3 times
I've taken this quiz 3 times and can't pass it. applied managerial statistics … read more
GLENN
Master of Mathematics
369 satisfied customers
A wheel with a radius of 500 mm has a mass of 35 kg and a
A wheel with a radius of 500 mm has a mass of 35 kg and a radius of gyration of 300 mm. A rope around the rim of the wheel provides a tangentle force of 2.0 N to the wheel which turns on an axle. Find… read more
Ryan
Bachelor\u0027s Degree
1,060 satisfied customers
I am new to this and I have some home work as well as
Hello I am new to this and I have some home work as well as quizzes that I need help with … read more
GLENN
Master of Mathematics
369 satisfied customers
How much would it be to solve and show how you got the
How much would it be to solve and show how you got the solution for 15 questions. Business Statistics, Inferences and Linear Regression… read more
GLENN
Master of Mathematics
369 satisfied customers
You helped me back in December with a Pearson Correlation. I
Hey Ryan,You helped me back in December with a Pearson Correlation.I was seeking your help in the same way with solving and describing SOME of the rationale behind the reasoning of the answer for anot… read more
GLENN
Master of Mathematics
369 satisfied customers
I have completed a college assignment for statistics. It was
I have completed a college assignment for statistics. It was a forty question assignment and I was wanting to check my answers. Can you help me with that? … read more
GLENN
Master of Mathematics
369 satisfied customers
I need homework help. Not understanding probability. A
Hi. I need homework help. Not understanding probability. … read more
Ryan
Bachelor\u0027s Degree
1,060 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less