Taking the family to an amusement park has become increasingly costly according to the industry publication Amusement Business, which provides figures on the cost for a family of four to spend the day at one of America's amusement parks. A random sample of 25 families of four that attended amusement parks yielded the following costs, rounded to the nearest dollar.
Obtain and interpret a 95% confidence interval for the mean cost of a family of four to spend the day at an American amusement park. (Note: . x = $193.32; s = $26.73.)
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