Question

A college admissions officer takes a simple random sample of 80 entering freshmen and computes their...

A college admissions officer takes a simple random sample of 80 entering freshmen and computes their mean mathematics SAT score to be 469. Assume the population standard deviation is 95. Construct a 95% confidence interval for the mean mathematics SAT score for the entering freshmen class.

x ̅=

σ=

n=

Z=

The confidence interval for the population mean is

Lower limit:

Upper limit:

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

Homework Answers

Answer #1

Mean = 469

Sample size (n) = 80

Standard deviation () = 95

Confidence interval(in %) = 95

z @ 95.0% = 1.96

Since we know that

Required confidence interval

Required confidence interval = (469.0-20.8178, 469.0+20.8178)

Required confidence interval = (448.1822, 489.8178)

Lower limit: 489.8178

Upper limit: 448.1822

Please hit thumps up if the answer helped you.   

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 college admissions officer takes a simple random sample of 120 entering freshman and computes their...
a college admissions officer takes a simple random sample of 120 entering freshman and computes their mean mathematics SAT score to be 448. Assume the population standard deviation is 92. Construct a 98% confidence interval for the mean mathematics SAT score for the entering freshmen class.
1)Find the critical value zα/2 needed to construct a(n) 97% confidence interval 2)A college admissions officer...
1)Find the critical value zα/2 needed to construct a(n) 97% confidence interval 2)A college admissions officer takes a simple random sample of 110 entering freshmen and computes their mean mathematics SAT score to be 465. Assume the population standard deviation is Construct a 90% confidence interval for the mean mathematics SAT score for the entering freshmen class. 3) In a small-overlap front crash test, a car is crashed into a simulated telephone pole and the maximum intrusion of debris into...
A random sample of 46 Foreign Language movies made since 2000 had a mean length of...
A random sample of 46 Foreign Language movies made since 2000 had a mean length of 130.9 minutes, with a standard deviation of 12.7 minutes. Part 1 of 2 Construct a 99.8% confidence interval for the true mean length of all Foreign Language movies made since 2000. Round the answers to one decimal place. 2. A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 463. Assume the...
1) a college admissions officer sampled 108 entering freshman and found that 34 of them scored...
1) a college admissions officer sampled 108 entering freshman and found that 34 of them scored less than 600 on the math SAT. a) find the point estimate for the proportion of all entering freshman at this college who scored less than 600 on the math SAT. Round your answer to at least 3 decimal places. the point estimate for the proportion of all entering freshman at this college who scored less than 600 on the math SAT is: 2)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT) for the school's male and female applicants. A random sample of 13 male applicants results in a SAT scoring mean of 1061 with a standard deviation of 27. A random sample of 9 female applicants results in a SAT scoring mean of 1026 with a standard deviation of 56 . Using this data, find the 98% confidence interval for the true mean difference between...
A college admissions officer states that the average ACT score for incoming freshmen at her school...
A college admissions officer states that the average ACT score for incoming freshmen at her school is no more than 22 and that standard deviation for ACT scores is 4 points. A sample of 36 incoming freshmen reveals an average ACT score of 23.5. State the null and alternative hypotheses concerning this claim and test the hypothesis at the 99% confidence level using the P-value. Is the officer's statement correct, based on this sample information and your test?
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT) for the school's male and female applicants. A random sample of 1111 male applicants results in a SAT scoring mean of 1204with a standard deviation of 3838. A random sample of 1919 female applicants results in a SAT scoring mean of 1105with a standard deviation of 3131. Using this data, find the 98% confidence interval for the true mean difference between the scoring mean...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT) for the school's in-state and out-of-state applicants. A random sample of 9 in-state applicants results in a SAT scoring mean of 1238 with a standard deviation of 49. A random sample of 17 out-of-state applicants results in a SAT scoring mean of 1150 with a standard deviation of 35. Using this data, find the 99% confidence interval for the true mean difference between the...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT) for the school's in-state and out-of-state applicants. A random sample of 18 in-state applicants results in a SAT scoring mean of 1150 with a standard deviation of 36. A random sample of 12 out-of-state applicants results in a SAT scoring mean of 1113 with a standard deviation of 54. Using this data, find the 95% confidence interval for the true mean difference between the...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT)...
The admissions officer at a small college compares the scores on the Scholastic Aptitude Test (SAT) for the school's in-state and out-of-state applicants. A random sample of 16 in-state applicants results in a SAT scoring mean of 1144 with a standard deviation of 55. A random sample of 10 out-of-state applicants results in a SAT scoring mean of 1185 with a standard deviation of 41. Using this data, find the 99% confidence interval for the true mean difference between the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT