W. Grant; the son of aleprechaun and a Cheyenne Indian . Neal checks a number of roadmaps, but there does not appear to be an Interstate 60. Taking a guess, he sets out West, only to encounter O.W. Grant along the roadside. Grant happily greets Neal, and hands him a bag containing a 'birthday present.' The present turns out to be a Magic 8-Ball, which can answer any yes-or-no question that Neal asks it. Shortly after their meeting, Grant gives Neal some directions, and they are soon on the unlisted Interstate 60. Traveling along the mysterious highway, Neal and Grant discuss such things as the humor found in causing people to recognize the gullible side of themselves, Grant's unfortunate accident that cost him his penis, and the certainty of knowing what to wish for. Grant departs soon after, leaving Neal to run into such characters as: •A promiscuous woman looking for perfect sex. She leaves the car after Neal tells her that her
telephone numbers in the country that is being investigated. Frame coverage errors occur when there is a mismatch between the sampling frame and the target population. In other words when there is no one-to-one correspondence between the units in the frame and the units in the target population. The most common form of coverage error is undercoverage, that is, not all units of the target population are included in the sampling frame. A clear example of undercoverage is persons with an unlisted phone number when the sampling frame is the telephone book. Another form of coverage error is overcoverage; here a unit from the target population appears more than once in the sampling frame. Duplications like this can occur when a sampling frame results from the combination of several lists. For example, on one list a woman is listed under her maiden name, and on a second list under her married name. If these lists are combined, the same person is listed under two different entries