Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.

Get a Professional Answer

Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

100% Satisfaction Guarantee

Rate the answer you receive.

Ask R.R. Jha Your Own Question

R.R. Jha, Bachelor's Degree

Category: Calculus and Above

Satisfied Customers: 5471

Experience: Math Expert

20870358

Type Your Calculus and Above Question Here...

R.R. Jha is online now

Let us assume that the prices of regular unleaded gasoline

This answer was rated:

★★★★★

Let us assume that the prices of regular unleaded gasoline across the nation are normally distributed with a mean of $3.60 and a standard deviation of $0.32.

Describe the shape and horizontal scaling on the graph of the distribution for the population of all regular unleaded gasoline prices (hereafter referred to simply as gas prices).

If all possible samples of size 16 from the population of these gas prices are drawn and the mean is found for each sample, describe the shape and horizontal scaling on the graph of the sampling distribution for these sample mean values as theorized by the Central Limit Theorem.

Find the probability that the price from a single randomly selected gas station will be more than $4.00. Based upon your results, would it be unusual to find an individual gas station where the price is more than $4.00?

Find the probability that the mean from 16 randomly selected gas stations will be more than $4.00. Based upon your results, would it be unusual to find a sample of 16 randomly selected gas stations where the average price is more than $4.00?

A survey of 210 registered voters revealed that 107 of them plan on voting for the incumbent. Find a 95% confidence interval for the proportion of all registered voters who plan on voting for the incumbent. Does it appear statistically valid to conclude that more than 50% of all registered voters plan on voting for the incumbent? Why or why not?

Suppose you want to estimate the percentage of registered voters who plan to vote for the incumbent and you want your estimate to be within 2 percentage points of the correct population measure, based upon a 95% confidence level. What minimum size sample is required? Assume that no estimate of "p-hat" is known.

This probability is found by looking up the normal probability table or by using statistical calculator. I used Microsoft Excel to find this, exact probability was something like 2.87 x 10^-7.

And I've updated the file with answers to your bonus question too. You may download it from same link above.

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.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal ...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

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

Meet The Experts:

SusanAthena

Master's Degree

Satisfied Customers:

102

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