The z-value used in a 80% Confidence Interval is
1.645
2.575
1.282
1.96
Solution :
Given that,
At 80% confidence level the z is ,
= 1 - 80% = 1 - 0.80 = 0.20
/ 2 = 0.20 / 2 = 0.10
Z/2 = Z 0.10 = 1.282
z-value = 1.282
The z-value used in a 80% Confidence Interval is 1.645 2.575 1.282 1.96
Match the confidence level with the confidence interval for the population mean. 1. ?bar±2.575(?/√n) 2. ?bar±1.645(?/√n) 3. ?bar±1.282(?/√n) A. 80% B. 90% C. 99%
(6 points) Match the confidence level with the confidence interval for u. 1. 1.96 () 2.3 +1.645 () 3. + 2.575 () A. a. 95% B. b. 90% C. c. 99%
What is the confidence level for each of the following confidence intervals for µ? x ̅±1.96(δ⁄√n) x ̅±1.645(δ⁄√n) x ̅±2.575(δ⁄√n) x ̅±1.282(δ⁄√n) x ̅±0.99(δ⁄√n)
The confidence level in a confidence interval is established by A Z-value, such as 1.96 for a 95% confidence interval A t-value, using the appropriate degrees of freedom and the level desired The appropriate statistic for the test distribution The F statistic, using the appropriate degrees of freedom and the level desired
Match the critical value with the confidence level. 2.576 1.96 1.645 2.326 1. 90% 2. 95% 3. 98% 4. 99%
A 99% confidence interval for is given by: The multiplier is __________ . A. 2.576 B. 1.96 C. None of the other choices represent a suitable response. D. 1.282 E. 3
3. P(z<zc)=0.95. Find ze (a) 1.28 (b) 1.645 (c) 1.96 (d) -1.645
Provide an appropriate response. Find the critical value and rejection region for the type of z- test with level of significance a. Right- tailed test, a = 0.01 O zo 1.96; ; z > 1.96 2.33; z> 2.33 zo zo 2.575; z> 2.575 zo 1.645; z> 1.645 QUESTIO 8 points Save Answer Provide an appropriate response. Suppose you want to test the claim that 3.5. Given a sample size of n 40 and a level of significance of a 0.05...
With 90% confidence interval and n = 15. Find left critical value for Zinterval. Group of answer choices -1.282 -1.645 -1.761 -1.345
If we want to provide a 90% confidence interval for the mean of a population and the population standard deviation is known, the correct Z value is 0.95 1.96 0.485 1.645