Statistical analysis significance

Question

Take that I am in customer service and encounter 2000 customers in a six month period. I ask those customers to complete a survey about my performance, knowledge and curtesy. How many of the surveys need to completed before any data derived from the surveys is considered significant?

Answer 1

For the rule of 30, you will need:

 

  30 = 2000x

 

 30/2000 = x

 

3/200 = x

 

 x = 1.5%

 

You need 1.5%