浙教版数学七年级下册6.4频数与频率基础检测
年级:七年级 学科:数学 类型:同步测试 来源:91题库
一、单选题(共15小题)
组别 | A型 | B型 | AB型 | O型 |
频率 | 0.4 | 0.35 | 0.1 | 0.15 |








二、填空题(共8小题)
三、解答题(共5小题)
书名 代号 | 借阅 频数 | |||||
星期一 | 星期二 | 星期三 | 星期四 | 星期五 | ||
A | 3 | 2 | 2 | 3 | 4 | 14 |
B | 4 | 3 | 3 | 2 | 3 | 15 |
C | 1 | 2 | 3 | 2 | 3 | 11 |
(1)在表中填写五天内每本书的借阅频数.
(2)计算五天内《汉语字典》的借阅频率.
14 | 13 | 13 | 15 | 16 | 12 | 14 | 16 | 17 | 13 |
14 | 15 | 12 | 12 | 13 | 14 | 15 | 16 | 15 | 14 |
13 | 12 | 15 | 14 | 17 | 16 | 16 | 13 | 12 | 14 |
14 | 15 | 13 | 16 | 15 | 16 | 17 | 14 | 14 | 13 |
(1)在这个统计表中,13岁的频数是多少?频率是多少?
(2)多少岁的频率最大,这个最大频率是多少?
(3)假如老师随机地问一名学生的年龄,你认为老师最可能听到的回答是多少岁?
3.141 592 653 589 794 238 462 643 383 279 502 88
(1)试用画“正”字的方法记录圆周率的上述近似值中各数字出现的频数,并完成下表;
数字 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
画“正”字 | ||||||||||
发现的频数 |
(2)在这串数字中,“3”,“6”,“9”出现的频率各是多少?
Two Trips
Jack brought a small plane and began to fly it. He soon became excited and made his plane all kinds of tricks.
Jack had a friend,named Tom. One day Jack said to him,“I will pick you up in my plane.““I will be glad to.'answered Tom. They went up,and Jack flew around for half an hour and did all kinds of tricks in the air. Then they came down. Tom was to be back safely,and said to Jack,“Well,Jack,thank you very much for those two trips in your plane.“Jack was very surprised and asked,“Two trips?““Yes,my first and my last.'an﹣swered Tom.
根据上文填表
出现字母的个数 | 100 | 150 | 200 | 250 | 300 | 350 | 400 |
出现字母a的频数 | |||||||
出现字母a的频率 | |||||||
出现字母b的频数 | |||||||
出现字母b的频率 |