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Statistics
A 95% confidence level for the difference between u1 and u2 runs from 2 to +6. From this we can infer that a. u1 is probably greater than u2. b. u1 is probably less than u2. c. there may be no difference at all between u1 and u2.
asked by Kevin on April 30, 2014 
Business statistics
3. Determine the tcritical value for a twosided confidence interval in each of the following situations. a. Confidence level = 95%, df = 15 b. Confidence level = 99%, n = 5. c. Confidence level = 95%, n = 15 d. Significance
asked by Lizzie on March 25, 2015 
math help
Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . (b) Determine
asked by Tommy8 on June 22, 2013 
math help
Please help me on these I have lost the tables that I would need to answer them or at least the ones I think are used. Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of
asked by Tommy7 on June 22, 2013 
math
Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . (b) Determine
asked by Sue 8 on June 21, 2013 
math
Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . (b) Determine
asked by JACKIE on June 22, 2013 
statistics
Pleas HeLp!!!!!!!!!! A random sample of the test scores of 100 applicants for college entry at a large junior college showed a mean score of 72.6. Determine a 99%, 95%, and 90% confidence interval for the m mean score of all
asked by courntey on September 17, 2011 
statistics
You intend to estimate a population proportion with a confidence interval. The data suggests that the normal distribution is a reasonable approximation for the binomial distribution in this case. While it is an uncommon confidence
asked by Denise on July 26, 2017 
Statistics
We have calculated a 95% confidence interval for a proportion and would prefer the confidence interval to be more precise, that is narrower. Using the same sample, we can narrow the confidence interval using which of the
asked by Nick on October 27, 2013 
Statistics
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals:
asked by Hope on October 5, 2011