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 Chirag Your Own Question

Chirag, Master's Degree

Category: Math Homework

Satisfied Customers: 12192

Experience: Excellent Tutor with a long teaching experience at different levels.

13269833

Type Your Math Homework Question Here...

Chirag is online now

Assume that the weight loss for the first month of a diet

Resolved Question:

1.Question :Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution. Find the probability of the given range of pounds lost. Less than 11 pounds Student Answer: 1/3 1/6 5/6 5/7

2.Question :If z is a standard normal variable, find the probability. The probability that z is less than 1.13 Student Answer: 0.1292 0.8708 0.8485 0.8907

3.Question :Solve the problem. Round to the nearest tenth unless indicated otherwise. The amount of rainfall in January in a certain city is normally distributed with a mean of 4.3 inches and a standard deviation of 0.3 inches. Find the value of the quartile . Student Answer: 1.1 4.1 4.2 4.5

4.Question :Assume that X has a normal distribution, and find the indicated probability. The mean is 15.2 and the standard deviation is 0.9. Find the probability that X is greater than 17. Student Answer: 0.9713 0.9821 0.0228 0.9772

5.Question :Solve the problem. The weights of the fish in a certain lake are normally distributed with a mean of 19 lb and a standard deviation of 6. If 4 fish are randomly selected, what is the probability that the mean weight will be between 16.6 and 22.6 lb? Student Answer: 0.0968 0.4032 0.6730 0.3270

6.Question :Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution. A multiple choice test consists of 60 questions. Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct. Student Answer: 0.0901 0.8508 0.3508 0.1492

7.Question :Use the normal distribution to approximate the desired probability. Find the probability that in 200 tosses of a fair die, we will obtain at least 40 fives. Student Answer: 0.0871 0.1210 0.2229 0.3871

8.Question :Solve the problem. The following confidence interval is obtained for a population proportion, p: (0.707, 0.745). Use these confidence interval limits to find the margin of error, E. Student Answer: 0.038 0.017 0.019 0.020

9.Question :Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. 95% confidence; the sample size is 10,000, of which 40% are successes Student Answer: 0.0072 0.0110 0.0126 0.0096

10.Question :Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. n = 110, x = 55; 88% confidence Student Answer: 0.425 < p < 0.575 0.421 < p < 0.579 0.422 < p < 0.578 0.426 < p < 0.574

11.Question :Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.05; confidence level: 99%; from a prior study, is estimated by 0.15. Student Answer: 17 339 407 196

12. Question: Solve the problem. Round the point estimate to the nearest thousandth. 430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours. Student Answer: 0.521 0.519 0.479 0.343

13. Question: Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. When 319 college students are randomly selected and surveyed, it is found that 120 own a car. Find a 99% confidence interval for the true proportion of all college students who own a car. Student Answer: 0.313 < p < 0.439 0.332 < p < 0.421 0.323 < p < 0.429 0.306 < p < 0.446

14. Question: Solve the problem. In a certain population, body weights are normally distributed with a mean of 152 pounds and a standard deviation of 26 pounds. How many people must be surveyed if we want to estimate the percentage who weigh more than 180 pounds? Assume that we want 96% confidence that the error is no more than 4 percentage points. Student Answer: 657 317 501 232

15. Question: Use the confidence level and sample data to find the margin of error E. Round your answer to the same number of decimal places as the sample mean unless otherwise noted. College students' annual earnings: 99% confidence; n = 76, Student Answer: $196 $891 $233 $258

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