Consider the following results for two independent random samples taken from two populations.

 

1. What is the point estimate of the difference between the two population means?
   
   
   
2. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals).
   (  ,  )
   
   
3. Provide a 95% confidence interval for the difference between the two population means (to 2 decimals).
   (  ,  )

Sample 1 n = 50 x = 13.6 2.2 = Sample 2 m = 35 * = 11.6 % = 3.0