The thickness of a bar sample containing 16 specimen was measured using micrometer and presented below in [mm]. The operator who did the measurements presented a confidence interval of (6.668, 7.054) for the average thickness. What is the confidence level of this confidence interval? 2. The thickness of a bar sample containing 16 specimen was measured using micrometer and presented below in [mm]. The operator who did the measurements presented a confidence interval of (6.668 7.054) for the average thickness. What is the confidence level of this confidence interval? 7.035 7.158 6.812 7.004 6.934 5.968 7.346 7.235 5.991 7.369 7.441 6.907 6.870 6.428 6.376 6.902
Added by Jessica H.
Close
Step 1
To calculate the sample mean, add up all the thickness measurements and divide by the total number of measurements (16). Sum of thickness measurements = 7.035 + 7.158 + 6.812 + 7.004 + 6.934 + 5.968 + 7.346 + 7.235 + 5.991 + 7.369 + 7.441 + 6.907 + 6.870 + 6.428 + Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 84 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
Six measurements are taken of the thickness of a piece of 18-gauge sheet metal. The measurements (in mm) are: 1.316, 1.308, 1.321, 1.303, 1.311, and 1.310. a) Make a dotplot of the six values. b) Should the t curve be used to find a 99% confidence interval for the thickness? If so, find the confidence interval. If not, explain why not. c) Six independent measurements are taken of the thickness of another piece of sheet metal. The measurements this time are: 1.317, 1.318, 1.301, 1.307, 1.374, 1.323. Make a dotplot of these values. d) Should the t curve be used to find a 95% confidence interval for the thickness of this metal? If so, find the confidence interval. If not, explain why not.
Adi S.
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. A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of $297.29. Find a 98% confidence interval for the true mean checking account balance for local customers. a. Find the point estimate of the mean, x̄. b. State the critical value, tα/2. c. Calculate the margin of error. d. Give the confidence interval in interval notation.
Qudsiya A.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD