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8 Questions returned
No. & Date AskedQuestion
# 523 :: 11/24/08
Question 523 has been Answered
Use the given degree of confidence and sample data to construct a confidence interval for the population mean x. Assume that the population has a norm. . .

Confidence Intervals, TINV

# 505 :: 11/11/08
Question 505 has been Answered
Calculate a 98% confidence interval for the following data 15.7,15.7,15.5,15.2,15.2,15.1,15.3.. . .

Confidence Intervals, TINV, Margin of Error, t-statistic

# 487 :: 10/28/08
Question 487 has been Answered
Find a confidence interval for the mean assuming that each sample is from a normal population. Mean = 127, s = 27, n = 16. Find the 90% Confidence Int. . .

TINV, t-distribution, Confidence Intervals

# 485 :: 10/27/08
Question 485 has been Answered
Assume that the heights of 5 year old boys are normally distribued with a mean of 100cm and a standard deviation of 60. What is the sampling distribut. . .

TINV, Confidence Intervals, Standard Error of the Mean, Standard Deviation of the Mean

# 411 :: 9/24/08
Question 411 has been Answered
Do you have any hints how I can figure out critical values at the significance level? Can you figure this out in excel or megastat? Is there a equat. . .

NORMSINV, TINV

# 399 :: 9/20/08
Question 399 has been Answered
When you calculate CIs for time on task, I notice that you use the critical value from the t-distribution (TINV(0.05, degrees_of_freedom)). But when y. . .

exact interval, Binomial Probability, TINV, Adjusted Wald, Wald Interval, Normal Approximation, Small Sample

# 212 :: 6/1/08
Question 212 has been Answered
How would I figure out a 90% and 95% confidence interval for the below informaion? What would be the formula? Can I figure this out in Excel or Mega. . .

t-distribution, Confidence Intervals, TINV, Margin of Error

# 151 :: 4/14/08
Question 151 has been Answered
A random sample of 25 households finds that an average of 2.3 people reside in each house (the standard deviation is 0.35). With a 95% confidence lev. . .

TINV, t-statistic, t-distribution, Confidence Intervals, Standard Error of the Mean, Margin of Error