If the highest price of the 45 houses is , then the range of the prices of the 45 houses is .
Click on a choice, then click on a blank.
本题结合了图表题和计算题的特点,并再次体现了前述对于统计学概念的精确认识要求提高的要点。本题考察的是极差这一概念,即某一集合中的最大值与最小值之间的差值。只要了解Range的含义并且理解了本题图表,解题难度不大。本题中最低房价处于$100,000到$133,000的区间之中,因此极差最大值为最高房价减去$100000,极差最小值为最高房价减去$133000,通过对所给选项的试验发现只有分别填$190000和at least $57000才能使这句话成立。
4,出现了判断题,即要求考生判断某一等式或某一命题的对与错
例6,The symbol represents one of the four operations of addition, subtraction, multiplication, and division, and 3 1 = 3.
For each of the following equations, indicate whether the equation must be true, must be false, or could be either true or false.
EquationMust Be TrueMust Be FalseCould Be True or False
6 2 = 3
6 2 = 4
6 2 = 12
Click on your choices.
Click on the answer box, then type in a number. Backspace to erase.
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