Question

A study investigated the 2D:4D ratio in women of European descent at a large college. A...

A study investigated the 2D:4D ratio in women of European descent at a large college. A sample of 135 women yielded an average 2D:4D ratio of 0.988. Suppose it is known that the standard deviation of the ratio is 0.028. What is a 90% confidence interval for the population mean? What is a 98% confidence interval of the population mean? Which one is wider?

Homework Answers

Answer #1

For further queries, please comment Below.

Thank you.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
An article investigated the consumption of caffeine among women. A sample of 40 women were asked...
An article investigated the consumption of caffeine among women. A sample of 40 women were asked to monitor their caffeine intake over the course of one day. The mean amount of caffeine consumed in the sample of women was 240.944 mg with a standard deviation of 207.976 mg. In the article, researchers would like to include a 99% confidence interval. The values below are t critical point corresponding to 90%, 95%, 98%, and 99% confidence. Which critical point corresponds to...
A study is conducted concerning the blood pressure of 60-year old women with glaucoma. In the...
A study is conducted concerning the blood pressure of 60-year old women with glaucoma. In the study a random sample of 1000 60-year old women with glaucoma was taken and the sample mean systolic blood pressure was 132 mm Hg and the sample standard deviation was 23 mm Hg. A)The sample standard deviation of 23 mm Hg is an estimate of what (i.e: this is an estimate of the variation in what values?) B) Based on the sample results, what...
A random sample of 40 child residents in a large population yielded a mean weight of...
A random sample of 40 child residents in a large population yielded a mean weight of x= 39.2 kilograms. Suppose it is known that the distribution of weight of child residents in this population has a standard deviation of 9.8 kilograms. A. Give an approximate 90% confidence interval for the mean weight of child residents in the population. B. What sample size is required if we want 90% confidence and the margin of error to be 1 kilogram?
The driving distances of college students who commute to a particular school are normally distributed. In...
The driving distances of college students who commute to a particular school are normally distributed. In a random sample of 8 college students, the sample mean driving distance was 22.2 miles and the sample standard deviation was 5.8 miles. (a). Construct a 98% confidence interval for the mean driving distance of all the college students who drive to the school. Write a sentence interpreting your interval. (Round answer to 2 decimal places) 7(b). Suppose the population standard deviation was known...
A class survey in a large class for first-year college students asked, "About how many hours...
A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 460 students was x¯¯¯x¯ = 16 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 8 hours in the population of all first-year students at this university. What is the 99% confidence interval (±±0.001) for the population mean? Confidence interval is from  to  hours.
ch16 #13. (16.19) A class survey in a large class for first-year college students asked, "About...
ch16 #13. (16.19) A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 462 students was x⎯⎯hat = 14 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 8 hours in the population of all first-year students at this university. What is the 99% confidence interval (±±0.001) for the population mean? Confidence interval is from...
(1 point) A class survey in a large class for first-year college students asked, "About how...
(1 point) A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 278 students was x⎯⎯⎯ = 147 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation σ = 65 minutes in the population of all first-year students at this university. Use the survey result to give a 90% confidence interval for the mean study...
A survey of a group of students at a certain college, we call College ABC, asked:...
A survey of a group of students at a certain college, we call College ABC, asked: "About how many hours do you study in a week?" The mean response of the 400 students is 15.8 hours. Suppose that the study time distribution of the population is known to be normal with a standard deviation of 8.5 hours. Use the survey results to construct a 95% confidence interval for the mean study time at the College ABC. Show your work neatly.
A class survey in a large class for first-year college students asked, "About how many minutes...
A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 285 students was x⎯⎯⎯x¯ = 132 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation σσ = 65 minutes in the population of all first-year students at this university. Use the survey result to give a 95% confidence interval for the mean study time of...
A very large study of college students’ study habits found that the time (in hours) that...
A very large study of college students’ study habits found that the time (in hours) that freshmen study each week is approximately normal with mean 24 hours and standard deviation 8 hours. What is the probability that a sample of size n equals 16 from this population would result in a sample mean greater than 30 hours? 0.7734 0.2266 0.0013 0.9987