• 100% Satisfaction Guarantee

Math-John, PhD in Statistics
Category: Math Homework
Satisfied Customers: 1304
Experience:  MS and BS in Math
62644613
Type Your Math Homework Question Here...
Math-John is online now

# Consider the formula used for any confidence interval and the

### Resolved Question:

Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the original sample statistic? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula.
Submitted: 2 years ago.
Category: Math Homework
Expert:  Math-John replied 2 years ago.

johnczheng :

Hi, I am working on it and will post the answer shortly.

johnczheng :

The formula for confidence interval is:
(Sample statistic - (standard error) * (critical value), Sample statistic + (standard error) * (critical value))
(a) as confidence level increases, the critical value also increases, so confidence interval will become wider.
(b) as sample size increases, the standard error will become smaller, so confidence interval will become narrower.
(c) sample statistic is the center of the confidence interval. So as this increases, the confidence interval shift to the right but the width stays same.

Math-John, PhD in Statistics
Category: Math Homework
Satisfied Customers: 1304
Experience: MS and BS in Math
Expert:  Math-John replied 2 years ago.
What Happens Now?

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

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
< Last | Next >
• 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!!!! Alex Los 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. GP Hesperia, CA
• I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, 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. Esther Woodstock, 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. Robin Elkton, 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. Diane Dallas, TX

• ### Mr. Gregory White

#### Satisfied Customers:

86
M.A., M.S. Education / Educational Administration
< Last | Next >

### Mr. Gregory White

#### Satisfied Customers:

86
M.A., M.S. Education / Educational Administration

### Ray Atkinson

#### Satisfied Customers:

61
Grad student. Years and years of tutoring. Education, accounting, and math degrees.

### JACUSTOMER-yrynbdjl-

#### Satisfied Customers:

49
I have taught college Mathematics for the past 10 years.

### SusanAthena

#### Satisfied Customers:

39
Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

### Dr Arthur Rubin

#### Satisfied Customers:

34
Ph.D. in Mathematics, California Institute of Technology

### mhasan420

#### Satisfied Customers:

29
BA Maths, Oxford

### Don

#### Satisfied Customers:

17
M.S. Astronautical Engineering. Math/Science/Comp Tutor

## Related Math Homework Questions

Chat Now With A Math Tutor or Teacher
Math-John
Math Tutor or Teacher
1304 Satisfied Customers
MS and BS in Math