Question

An educational psychologist wishes to know the mean number of words a third grader can read...

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 98% level of confidence. For a sample of 997 third graders, the mean words per minute read was 26.826.8. Assume a population standard deviation of 3.7. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.

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

Homework Answers

Answer #1

TOPIC:Confidence interval for the population mean.

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
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 98% level of confidence. For a sample of 948 third graders, the mean words per minute read was 32.8. Assume a population standard deviation of 4.4. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 98%98% level of confidence. For a sample of 508508 third graders, the mean words per minute read was 29.829.8. Assume a population standard deviation of 3.23.2. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place. Lower endpoint: ______ Upper...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 99% level of confidence. For a sample of 4592 third graders, the mean words per minute read was 3838. Assume a population standard deviation of 4.6. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 90% level of confidence. For a sample of 837 third graders, the mean words per minute read was 24.9. Assume a population standard deviation of 5.1. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.
1) An educational psychologist wishes to know the mean number of words a third grader can...
1) An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an estimate at the 98% level of confidence. For a sample of 1434 third graders, the mean words per minute read was 25.9. Assume a population standard deviation of 3.5. Construct the confidence interval for the mean number of words a third grader can read per minute. Round your answers to one decimal place.
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.19 words per minute. A previous study found that the mean was 28.3 words per minute. Assuming that the variance is 29.16, what is the minimum number of third graders that must be included in a sample to construct the 98% confidence interval? Round your answer up to the...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.3 words per minute. A previous study found that the mean was 28.6 words per minute. Assuming that the standard deviation is 4.3, what is the minimum number of third graders that must be included in a sample to construct the 98% confidence interval? Round your answer up to...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.230.23 words per minute. A previous study found that the mean was 29.829.8 words per minute. Assuming that the variance is 23.0423.04, what is the minimum number of third graders that must be included in a sample to construct the 95%95% confidence interval? Round your answer up to the...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.23 words per minute. A previous study found that the mean was 29.5 words per minute. Assuming that the standard deviation is 3.8, what is the minimum number of third graders that must be included in a sample to construct the 80% confidence interval? Round your answer up to...
An educational psychologist wishes to know the mean number of words a third grader can read...
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to ensure that the estimate has an error of at most 0.31 words per minute. A previous study found that the mean was 28.7 words per minute. Assuming that the variance is 6.76, what is the minimum number of third graders that must be included in a sample to construct the 85% confidence interval? Round your answer up to the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT