Use Statistics to Get the Probability of a Sample Proportion
In a particular area ofthe Northeast,an estimated 75% ofthe homes use heating oil as the principal heating fuel during the winter.A random telephone survey of150 homes is taken in an attempt to determine whether this ï¬gure is correct.Suppose 120 ofthe 150 homes surveyed use heating oil as the principal heating fuel.What is the probability ofgetting a sample proportion this large or larger ifthe population estimate is true?