According to a recent study of 7335 young people in the US, 30% had been arrested for a crime other than a traffic violation by the age of 23. Crimes included such things as vandalism, underage drinking, drunken driving, shoplifting, and drug possession.
(a) Is the 30% a parameter or a statistic? Use the correct notation.
(b) Use the information given to estimate a parameter, and clearly define the parameter being estimated.

(c) The margin of error for the estimate in part (b) is 0.01. Use this information to give a range of plausible values for the parameter.
(d) Given the margin of error in part (c), if we asked all young people in theUSif they have ever been arrested, is it likely that the actual proportion is less than 25%?