A study claims that 75% of children under the age of 13 in British Columbia have been vaccinated from the chicken pox. A survey of randomly selected residents of a certain city included 650 children who were under the age of 13, and 197 of them were not vaccinated.

Part a
What is the approximated probability that sample proportion of non-vaccinated children in a sample of 650 children is more than 197/650? (Please carry answers to at least six decimal places in intermediate steps. Give your final answer to the nearest three decimal places).


Part b
Is the number of non-vaccinated children in this city sample unusually high, low, or neither?
Answer: Select one High Low Neither