Refer to the Following Paragraph to Answer the Questions Below

Refer to the following paragraph to answer the questions below.
The Young Children's Charity would like to provide an accurate estimate of how much it costs to raise a child between the ages of 2 and 12 for its fund raising campaign. They contracted with you to find out how much households spent on raising a child in 1996. They gave you a list all 400,000 residential telephone customers in the area they will operate the campaign. You sampled every 400th address on the list. The Charity will have a survey company contact each household sampled and ask whether or not there is a child between 2 and 12 years of age living in the household. If there is, they will ask other questions and record the total amount spent raising a child during 1996.
-What is a range of values, usually a little higher and lower than a specific value found in a sample, within which a researcher has a specified and high degree of confidence that the population parameter lies?

A) convenient sample
B) simple random sample
C) mathematical equation
D) confidence intervals