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No. & Date Asked  Question 

# 523 :: 11/24/08

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

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,
tstatistic 
# 487 :: 10/28/08

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,
tdistribution,
Confidence Intervals 
# 485 :: 10/27/08

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

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

When you calculate CIs for time on task, I notice that you use the critical value from the tdistribution (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

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. . .
tdistribution,
Confidence Intervals,
TINV,
Margin of Error 
# 151 :: 4/14/08

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,
tstatistic,
tdistribution,
Confidence Intervals,
Standard Error of the Mean,
Margin of Error 