Question

In: Statistics and Probability

Find the T-critical values that correspond to a 90% confidence level (two-tails) when the sample size...

Find the T-critical values that correspond to a 90% confidence level (two-tails) when the sample size is 15. Draw the picture if it helps.

a) -1.753, 1.753

b) -1.761, 1.761

c) -2.145, 2.145

d) -1.345, 1.345

e) -1.645, 1.645

Solutions

Expert Solution


Related Solutions

For a confidence level of 98% with a sample size of 28, find the critical t...
For a confidence level of 98% with a sample size of 28, find the critical t value. Critical Value = (round answer to 3 decimal places) Assume that a sample is used to estimate a population mean μμ. Find the 99.9% confidence interval for a sample of size 33 with a mean of 72.3 and a standard deviation of 12.1. Enter your answer accurate to one decimal place. I am 99.9% confident that the mean μμ is between  and Assume that...
QUESTION 1 Find the critical value tc for a 95% confidence level when the sample size...
QUESTION 1 Find the critical value tc for a 95% confidence level when the sample size is 18. Use Table 4 on page A10 (Appendix) A. 1.740 B. 2.110 C. 2.101 D. 1.734 QUESTION 2 Let x be a random variable representing the SAT math score of student. We may assume that x has a normal distribution and that the population standard deviation is 25. A large university claims the average SAT math score for incoming freshman is 650. You...
Find the critical value X2R corresponding to a sample size of 6 and a confidence level...
Find the critical value X2R corresponding to a sample size of 6 and a confidence level of 95 percent. Round to three decimal places.
A) Find the z critical value for a 90% confidence level: Zc= B) Find the z...
A) Find the z critical value for a 90% confidence level: Zc= B) Find the z critical value for an 84% confidence level: Zc= C) The higher the confidence, the narrower the confidence interval True or False D) The greater the sample size, the mnarrower the confidence interval True or False E) In a recent study of 84 eighth graders, the mean number of hours per week that they watched TV was 22.3. Assume population standard deviation is 5.8 hours....
Simulate 100 confidence intervals with a 90% confidence level. Choose a sample size between 30 and...
Simulate 100 confidence intervals with a 90% confidence level. Choose a sample size between 30 and 100. Look at your confidence intervals. Now increase the confidence level to 95%. Look at your confidence intervals. Finally, increase the confidence level to 99%. Look at your confidence intervals. How does the confidence level affect your confidence intervals?
a.Use the Student's t distribution to find tc for a 0.95 confidence level when the sample...
a.Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 9. (Round your answer to three decimal) b.Use the Student's t distribution to find tc for a 0.99 confidence level when the sample is 31. (Round your answer to three decimal places.)
Use the Student's t distribution to find tc for a 0.95 confidence level when the sample...
Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 21. (Round your answer to three decimal places.) Use the Student's t distribution to find tc for a 0.99 confidence level when the sample is 14. (Round your answer to three decimal places.) Use the Student's t distribution to find tc for a 0.90 confidence level when the sample is 18. (Round your answer to three decimal places.)
Use the Student's t distribution to find tc for a 0.95 confidence level when the sample...
Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 21. (Round your answer to three decimal places.)
Find the critical value corresponding to a sample size of 9 and a confidence interval of...
Find the critical value corresponding to a sample size of 9 and a confidence interval of 99%. (Draw the graph) WRITE NEATLY
1a. Find the critical value tc for the confidence level c=0.80 and sample size n=15. tc=...
1a. Find the critical value tc for the confidence level c=0.80 and sample size n=15. tc= 1b. Find the critical value tc for the confidence level c=0.80 and sample size n=21. tc= 1c. Find the margin of error for the given values of​ c, s, and n. c=0.98,s=4, n=11
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT