The department of Transportation believes that the speed traveled on this road is 30 miles per hour. Is there evidence based on this data that the actual speeds are higher? Example: Coffee A coffee machine dispenses coffee into paper cups. You're supposed to get 10 ounces of coffee, but the amou varies slightly from cup to cup. Here are the amounts measured in a random sample of 20 cups. Is there evidence that the machine is shortchanging customers? 9.9 9.7 10.0 10.1 Number of Suitcases 9.9 9.6 9.8 9.8 10.0 9.5 9.7 10.1 9.9 9.6 10.2 9.8 10.0 9.9 9.5 9.9