Question

Suppose that when taking a random sample of 3 students’ GPAs, you get a sample mean...

Suppose that when taking a random sample of 3 students’ GPAs, you get a sample mean of 3.90!

This sample mean is far higher than college-wide (population) mean.

Discussion:

Does this provide that your sample is biased? Explain.

What else could have caused this high mean? Why?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

TOPIC: Unbiasedness and Consistency of an estimator.

0 0
Know the answer?
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
Similar Questions
Suppose that 300 statistics students each took a random sample (with replacement) of 50 students at...
Suppose that 300 statistics students each took a random sample (with replacement) of 50 students at their college and recorded the ages of the students in their sample. Then each student used his or her data to calculate a 90 % the confidence interval for the mean age of all students at the college. How many of the 300 intervals would you expect to capture the true population mean age, and how many would you expect not to capture the...
Suppose you perform a study about the hours of sleep that college students get. You know...
Suppose you perform a study about the hours of sleep that college students get. You know that for all people, the average is about 7 hours. You randomly select 35 college students and survey them on their sleep habits. From this sample, the mean number of hours of sleep is found to be 6.4 hours with a standard deviation of 0.97 hours. You want to construct a 95% confidence interval for the mean nightly hours of sleep for all college...
Suppose you want to estimate the mean GPA of all students at your school. You set...
Suppose you want to estimate the mean GPA of all students at your school. You set up a table in the library asking for volunteers to tell you their GPAs. a. Will this method produce a representative sample? Why or why not? b. If there is bias in the experiment, explain what type of bias is present. c. Design a simple random sample to estimate the mean GPA of all students
Suppose you perform a study about the hours of sleep that college students get. You know...
Suppose you perform a study about the hours of sleep that college students get. You know that for all people, the average is about 7 hours. You randomly select 35 college students and survey them on their sleep habits. From this sample, the mean number of hours of sleep is found to be 6.2 hours with a standard deviation of 0.97 hours. You want to construct a 99% confidence interval for the mean nightly hours of sleep for all college...
1.) Suppose that 45% of students have taken an online course. A random sample of 200...
1.) Suppose that 45% of students have taken an online course. A random sample of 200 students is taken, of which 100 have taken an online course. A.) What is the probability of obtaining a sample proportion this high or higher? B.) There is some thought that the proportion taking online courses is no longer 45%. Based on the random sample, construct a 95% confidence interval for the proportion of students who have taken an online course. C.) Compute the...
Suppose you perform a study about the hours of sleep that college students get. You know...
Suppose you perform a study about the hours of sleep that college students get. You know that for all people, the average is about 7 hours. You randomly select 35 college students and survey them on their sleep habits. From this sample, the mean number of hours of sleep is found to be 6.2 hours with a standard deviation of 0.97 hours. We want to construct a 95% confidence interval for the mean nightly hours of sleep for all college...
Suppose you perform a study about the hours of sleep that college students get. You know...
Suppose you perform a study about the hours of sleep that college students get. You know that for all people, the average is about 7 hours. You randomly select 35 college students and survey them on their sleep habits. From this sample, the mean number of hours of sleep is found to be 6.2 hours with a standard deviation of 0.97 hours. We want to construct a 99% confidence interval for the mean nightly hours of sleep for all college...
A random sample of 50 students has a mean GPA of 2.55. It is known that...
A random sample of 50 students has a mean GPA of 2.55. It is known that the population standard deviation for the GPA of all students is 1.1. Use this information to complete the following: a) Does the information above provide an estimate of a population mean or a population proportion? b) Provide a point estimate for the population mean GPA of all students. c) Construct and interpret a 95% confidence interval for the parameter you selected in part (a)....
If you are taking a random sample from a normal population with  = 50 and = 6,...
If you are taking a random sample from a normal population with  = 50 and = 6, which of the following outcomes is more likely: (a) a sample mean of greater than 54 for a sample of n = 8, or (b) a sample mean of greater than 52 for a sample of n = 56? Explain your answer by stating the probabilities associated with each outcome.
Ages of students: A simple random sample of 100 U.S. college students had a mean age...
Ages of students: A simple random sample of 100 U.S. college students had a mean age of 22.68 years. Assume the population standard deviation is σ = 4.74 years. Construct a 99% confidence interval for the mean age of U.S. college students. The answer I posted my instructor says it is wrong. I came up with 21.45 to 23.91 a 99% confidence interval for the mean of the U.S college students She said the z procedures are needed. Thanks.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT