Use the given degree of confidence and sample data to construct a confidence interval for the population mean ?. Assume that the population has a normal distribution. Thirty randomly selected students took the college's calculus common final. If the sample mean was 84 and the standard deviation was 12.8, construct a 99 percent confidence interval for the mean score of all calculus students. a. 77.58 < ? < 90.42 b. 77.56 < ? < 90.44 c. 78.25 < ? < 89.75 d. 80.03 < ? < 87.97
Added by Ruben O.
Close
Step 1
We are given a sample size of 30 students, a sample mean of 84, and a sample standard deviation of 12.8. Show more…
Show all steps
Your feedback will help us improve your experience
Prabhakar Kumar and 71 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
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. Thirty randomly selected students took the calculus final. If the sample mean was 95 and the standard deviation was 6.6, construct a 99% confidence interval for the mean score of all students. A. 91.68 < μ < 98.32 B. 92.03 < μ < 97.97 C. 92.95 < μ < 97.05 D. 91.69 < μ < 98.31
Robin C.
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. Thirty randomly selected students took the calculus final. If the sample mean was 78 and the standard deviation was 7.5, construct a 99 percent confidence interval for the mean score of all students. 74.24 < μ < 81.76 74.23 < μ < 81.77 75.67 < μ < 80.33 74.63 < μ < 81.37
Ivan K.
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. Thirty randomly selected students took the calculus final. If the sample mean was 76 and the standard deviation was 7.7, construct a 90% confidence interval for the mean score of all students.
Qudsiya A.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD