Question

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly subjects are...

A sociologist develops a test to measure attitudes about public transportation, and 27 randomly subjects are given the test. Their average score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean score of all such subjects. Also find the margin of error. Round your answers to 3 decimal places.

a. (66.745,85.655), margin of error=9.455

b. (69.176,83.224), margin of error=7.024

c. (0.178,0.377), margin of error=0.101

d. (67.734,84.666), margin of error=8.466

e. (0.248,0.463), margin of error=0.108

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

Homework Answers

Answer #1

Answer : Option ( d )       (67.734,84.666), margin of error=8.466

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
A sociologist develops a test to measure attitudes about public transportation, and 20 randomly selected subjects...
A sociologist develops a test to measure attitudes about public transportation, and 20 randomly selected subjects are given the test. Their mean score is 75 and their standard deviation is 9 Construct 98% confidence interval for the mean score of all such subjects.
A sociologist develops a test to measure attitudes towards public transportation, and n = 79 randomly...
A sociologist develops a test to measure attitudes towards public transportation, and n = 79 randomly selected subjects are given the test. Their mean score is x ¯ = 74.3 and their standard deviation is s = 18.7. Find the margin of error E for the 95% confidence interval for the mean score of all such subjects, and round to the nearest tenth.
a sociologist develops a test designed to measure attitudes about disabled people and gives the test...
a sociologist develops a test designed to measure attitudes about disabled people and gives the test to 16 randomly selected subjects. their mean score is 71.2 with a standard deviation of 10.5. construct the 99 percent confidence interval for the mean score of all of the subjects
Use the given degree of confidence and sample data to construct a confidence interval for the...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ. Assume that the population has a normal distribution. A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given the test. Their mean score is x ¯ = 76.2 and their standard deviation is s = 21.4. Construct the 95% confidence interval for the mean score of all such subjects.
Use the given degree of confidence and sample data to find a confidence interval for the...
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence...
#1 Use the confidence level and sample data to find a confidence interval for estimating the...
#1 Use the confidence level and sample data to find a confidence interval for estimating the population μ. Find the margin of error E and round your answer to the nearest tenth. Test scores: n = 93, LaTeX: \bar{x}x ¯ = 88.5, σ = 6; 99% confidence #2 A sociologist develops a test to measure attitudes towards public transportation, and n = 82 randomly selected subjects are given the test. Their mean score is LaTeX: \bar{x}x ¯ = 75.9 and...
A group of 51 randomly selected students have a mean score of 29.5 with a sample...
A group of 51 randomly selected students have a mean score of 29.5 with a sample standard deviation of 5.2 on a placement test. What is the 95% confidence interval for the mean score, μ, of all students taking the test? Critical error= Margin of error= confidence interval=
You measure 27 backpacks' weights, and find they have a mean weight of 38 ounces. Assume...
You measure 27 backpacks' weights, and find they have a mean weight of 38 ounces. Assume the population standard deviation is 4.4 ounces. Based on this, what is the maximal margin of error associated with a 95% confidence interval for the true population mean backpack weight.
2. You randomly select and measure the lengths of 34 bolts. The sample mean length is...
2. You randomly select and measure the lengths of 34 bolts. The sample mean length is 1.24 inches and the standard deviation is 0.3 inches. Construct a 94% interval of confidence of the mean length of all bolts. Find a point estimate for the mean length of all bolts Verify that the conditions are met to construct an interval of confidence for the mean length of all bolts Calculate the critical Z value to construct a 94% confidence interval (round...
2. Suppose a new standardized test is given to 100 randomly selected third-grade students in New...
2. Suppose a new standardized test is given to 100 randomly selected third-grade students in New Jersey. The sample average score, Y¯ , on the test is 58 points, and the sample standard deviation, sY , is 8 points. (a) Construct a 95% confidence interval for the mean score of all New Jersey third graders. (b) Suppose the same test is given to 200 randomly selected third graders in Iowa, producing a sample average of 62 points and a sample...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT