Data show that 7% of children in the general population have ear tubes by the age of 3. (Note: ear tubes are used for children with constant ear infections to help drain fluid from the ear so as to prevent or decrease infection.) A simple random sample of n=150 children (3 years old) was taken from a county where there is a lack of medical access and facilities. From this sample, it was found that only 4 children had ear tubes.

a) What type of distribution does X (the number of children with ear tubes) have?

b) What is the=E(X)?

What is thethe standard deviation of X?