ZuoTi.Pro
Question

7. You want to estimate the mean weight loss of people one year after using a popular weight-loss (1 point) program being advertised on TV. How many people on that program must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 ib of the true population mean? Assume that the population standard deviation is known to be 10.6 lb. 6907 0 4865 O 84 O6906
3. Given the standard deviation of 16 for a population and a 95% confidence level, find the (1 point) margin of error of a sample space containing 60 values. 4.0486 0 3.3979 О 0.5227 O 29.4000 4. A researcher wants to estimate the mean grade point average of all current college students in (1 point) the United States. She has developed a procedure to standardize scores from colleges using something other than a scale between 0 and 4. How many grade point averages must be obtained so that the sample mean is within 0.1 of the population mean? Assume that a 90% confidence level is desired. Also assume that a pilot study showed that the population standard deviation is 0.88. o 15 o 298 0 1 210
5. Use the given information to construct a 99% confidence interval estimate ofthe mean of the (1 point) population n-39, ơ-386,7 41.7 40.1 < μ < 43.3 0405 <p < 42.9 41.4 < μ 42.0 -9.4 < μ 92.8 6. Randomly selected statistics students participated in an experiment to test their ability to (1 point) determine when 1 min (or 60 seconds) had passed. Forty students yielded a sample mean of 583 sec. Assume that the population standard deviation is 9.5 seconds and that there is a 95% confidence interval estimate of the population mean of all students 55.4 sec < u61.2 sec Give a correct interpretation of the confidence interval we are 95% confident that the interval from 55.4 seconds to 61.2 seconds actually does contain the true value of There is a 95% chance that the true value ofμ will fall between 55.4 seconds and 61.2 seconds. O 95% of sample means fall between 55.4 seconds and 61.2 seconds. o we are confident that 95% of values between 55.4 seconds and 61.2 seconds represent the true value of the population mean.
math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

tha 025 섬 ErhaA 46 0 .2 610 4.0486 obh .C whave Vh 41 11 2.5358x3.86 Inte etwen55.4 and 612 bucond

0 0
Add a comment
Know the answer?
Add Answer to:
7. You want to estimate the mean weight loss of people one year after using a...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1...

    6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1 point) We are 99% confident that the interval frorn 0 328 to 0 486 actually does contain the true value of the population mean μ There is a 99% chance that the true value ofμ will fall between 0 328 and 0 486. 99% of sample means fall between 0328 and 0486. We are confident that 99% of values between 0.328 and 0 486...

  • 1. You want to estimate the mean weightloss of people one year after using the Atkins...

    1. You want to estimate the mean weightloss of people one year after using the Atkins diet. How many dieters must be surveyed if we want to be 95% confident that the sample mean weight loss is within 25 lb of the true population mean? Assume that the population standard deviation is known to be 10.6 11b

  • 2. A population is known to have a standard deviation of 26.1. A sample space of...

    2. A population is known to have a standard deviation of 26.1. A sample space of 35 items has a mean of (1 point) 562. Construct a 90% confidence interval estimate of the mean of the population. 0566<p<558 0555<pバ569 O 551<H573 0561<p<563 3. While researching the cost of school lunches per week across the state, you use a sample size of 45(point) weekly lunch prices. The standard deviation is known to be 68 cents. In order to be 90% confident,...

  • A chain restaurant wants to estimate the population mean weight of one of their entrees. A...

    A chain restaurant wants to estimate the population mean weight of one of their entrees. A random sample size n = 36 showed sample mean = 18 ounces with sample standard deviation s = 1.8 ounces. Create a confidence interval at 95% confidence for the population mean μ.

  • You want to construct a confidence interval for the mean hours of sleep for all college...

    You want to construct a confidence interval for the mean hours of sleep for all college students and you want to find the appropriate sample size for some constraints outlined below. Assume you know the population standard deviation (σ) is 1.45 hours. (a) Estimate the sample size required to be 95% confident that the sample mean is within 0.2 hours of the population mean for college students. The minimum sample size is ___ students. (b) Estimate the sample size required...

  • You want to estimate the mean IQ for a population of students with a 95% confidence...

    You want to estimate the mean IQ for a population of students with a 95% confidence interval. Assume that the population standard deviation is known to be 15. If you want your estimate to be within 5 points of the value of the parameter, you will need a sample size of... (Round z to the nearest hundredth.)

  • 14. Randomly selected students participated in an experiment to test their ability to determine when one...

    14. Randomly selected students participated in an experiment to test their ability to determine when one minute​ (or sixty​ seconds) has passed. Forty students yielded a sample mean of 61.8 seconds. Assuming that σ=9.2 seconds, construct and interpret a 95​% confidence interval estimate of the population mean of all students. What is the 95​% confidence interval for the population mean μ​? ____<μ<____ ​(Type integers or decimals rounded to one decimal place as​ needed.) 15. Salaries of 43 college graduates who...

  • Question 7: (1 mark for each part) An agronomist wanted to estimate the mean weight of...

    Question 7: (1 mark for each part) An agronomist wanted to estimate the mean weight of a certain fruit (?) in his farm. He selected a random sample of size ? = 16, and found that the sample mean ?̅ = 55 gm and a sample stranded deviation ? = 3 gm. It is assumed that the population is normal with unknown standard deviation (?). a) Find a point estimate for (?). b) Find a 95% confidence interval for the...

  • You want to estimate the mean salary of people in a country, so you take a...

    You want to estimate the mean salary of people in a country, so you take a random sample of 49 people from around the country. The sample had an average salary of 8450 00 dollars with population standard deviation of 50000 dollars. Calculate the Lower Limit of the 95% confidence interval for the mean salary of the people in the country. Reminder: You only need to calculate the Lower Limit of the confidence interval

  • Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find...

    Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the​ 95% confidence interval. The sample standard deviation is given below. Margin of error equals​$5​, standard deviation equals​$19 The required sample size is __.

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT