statistics
posted by Gavin .
Using the central limit theorem, construct a 95% confidence interval for the average total cry time for infants in the control group and infants in the intervention group. For this question only, assume that the standard deviation of cry time within each group is known and is equal to 22 seconds.

statistics (incomplete) 
PsyDAG
95% = mean ± 1.96 SEm
SEm = SD/√n
What is your mean and n for each group?
Respond to this Question
Similar Questions

statistics
A consumer magazine has contacted a simple random sample of 33 owners of a certain model of automobile and asked each owner how many defects had to be corrected with in the first 2 months of ownership. The average number of defects … 
statistics
. Using the central limit theorem, construct a 95% confidence interval for the average total cry time for infants in the control group and infants in the intervention group. For this question only, assume that the standard deviation … 
statistics
Twosample Nonparametric Test Now, we examine the relationship between cry time and group among infants at Northbay. 1. Suppose we wish to perform a twosample test, but we do not want to make any normality (or other strong parametric) … 
statistics
Linear Regression In the babies.dta full dataset, generate a covariate called painind defined as 1 if the infant experienced severe pain upon receiving the shot (pain0 = 7) and as 0 otherwise. In Stata, you can use the commands: generate … 
statistics
• Twosample Nonparametric Test Now, we examine the relationship between cry time and group among infants at Northbay. 1. Suppose we wish to perform a twosample test, but we do not want to make any normality (or other strong parametric) … 
statistics
• Linear Regression In the babies.dta full dataset, generate a covariate called painind defined as 1 if the infant experienced severe pain upon receiving the shot (pain0 = 7) and as 0 otherwise. In Stata, you can use the commands: … 
Biostatistics
Hi, I have answered some questions for some homework and I've got one of them wrong. I cannot modify my answer but I would really love to know why my answer is wrong. This is the statement of the problem: n this series of questions, … 
maths
Using the fitted regression model, estimate the average change in cry time for infants with severe pain versus those without severe pain, holding group constant. Provide a 95% confidence interval for this estimate. 
statistics
Using the fitted regression model, estimate the average change in cry time for infants with severe pain versus those without severe pain, holding group constant. Provide a 95% confidence interval for this estimate 
statistics
Using the fitted regression model, estimate the average change in cry time for infants with severe pain versus those without severe pain, holding group constant. Provide a 95% confidence interval for this estimate. My question: What …