Question

In: Statistics and Probability

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

Solutions

Expert Solution

Refer t-distribution table OR use excel function "=T.INV.2T(0.20,14)" to find the critical value of tc.

------------------------------------------------------------------------------------------------------

Refer t-distribution table OR use excel function "=T.INV.2T(0.20,20)" to find the critical value of tc.

------------------------------------------------------------------------------------------------------

Refer t-distribution table OR use excel function "=T.INV.2T(0.02,10)" to find the critical value of tc.


Related Solutions

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.
Find the critical value, tc, for c=0.95 and n=41.
Find the critical value, tc, for c=0.95 and n=41.
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...
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
Find critical value tα/2 for n = 15 and 98% confidence level. A.±2.6245 B.±2.4142 C.±2.4460 D.±2.5551
Find critical value tα/2 for n = 15 and 98% confidence level. A.±2.6245 B.±2.4142 C.±2.4460 D.±2.5551
At a .01 significance level with a sample size of 18, find the critical value for...
At a .01 significance level with a sample size of 18, find the critical value for the correlation coefficient of 1.
9. Let c = 0.98 and n = 22. Find the critical value, tc. 10. Let...
9. Let c = 0.98 and n = 22. Find the critical value, tc. 10. Let c=0.80, s=5, and n=14.Find the margin of error, E. 11. Use the information below to to construct a confidence interval for the population mean, μ. Round your results to 3 decimal places for this problem. Assume that the population is nor- mally distributed. Let c = 0.90, x = 48.51, s = 2.15, and n = 19.
1) For a confidence level of 92%, find the Z-critical value 2) If n = 500...
1) For a confidence level of 92%, find the Z-critical value 2) If n = 500 and ˆpp^ (p-hat) = 0.7, construct a 99% confidence interval. 3) Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 405 drivers and find that 299 claim to always buckle up. Construct a 80% confidence interval for the population proportion that claim to always buckle up. 4) A political candidate...
Find the critical value Χ2/L corresponding to a sample size of 9 and a confidence interval...
Find the critical value Χ2/L corresponding to a sample size of 9 and a confidence interval of 99%. (Draw the graph) Please write neatly, and show work, no calculator.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT