The population mean for Verbal IQ scores is 100, with a standard deviation of 15. Suppose a researcher takes 50 random samples, with 30 people in each sample.

1. What is mean of the sample means?
   
   • 100
   • 15
   • 50
   • 30
   • Unable to determine from the information provided.
   
   
   
2. What is the standard deviation of the sample means?
   
   • 15
   • 2.74
   • 2.12
   • Unable to determine