1、GRE（ QUANTITATIVE）练习试卷 13及答案与解析 1 Ann scored 88, 93, 84, and 99 on 4 tests. What is her mean test score? 2 What is the mode of the data given below? 7,3,6,7,5,8,9,7 3 What is the median of the data given below? 8, 13, 9, 8, 15, 14, 10 4 Jordan had 3 hits in his first 4 baseball games and 4 hits in h
2、is next 4 games. What is the average number of hits Jordan had in all of his games? 5 What is the median of the data given below? 80, 19, 82, 15, 72, 3 GRE（ QUANTITATIVE）练习试卷 13答案与解析 1 【正确答案】 The mean is the average, so simply add the test scores and divide by 4 (the total number of tests): 88+93+84
3、+99=364 3644=91 2 【正确答案】 The mode is the number that appears most frequently in a series of numbers. In this case, the mode is 7. 3 【正确答案】 The median is the middle value in an ordered set of values. Therefore, the first step is to put the numbers in order, as follows: 8, 8, 9, 10, 13, 14, 15 As you
4、can see, 10 is the middle value. 4 【正确答案】 To calculate Jordans average number of hits, first find his total number of hits: 34=12 and44=16 12+16=28 Next, find the average: 288=3.5 5 【正确答案】 The median is the middle value in an ordered set of values. Therefore, the first step is to put the numbers in order, as follows: 3, 15, 19, 72, 80, 82 Because the set includes an even number of values, take the average of the middle values: 19+72=91 91-2=45.5
