Question

几道统计英文题

According to a survey of American households, the probability that the residents own 2 cars if annual household income is over $25,000 is 80%. Of the households surveyed, 60% had incomes over $25,000 and 70% had 2 cars.

1.the probability that the residents of a household own 2 cars and have an income less than or equal to $25,000a year is ________

2.the probablity that annual household income is over $25,000if the residents of a household own 2 cars is _______

3.the probability that annual household income is over $25,000 if the residents of a house hold do not own 2 cars is____

Answer 1

据一项调查显示，美国家庭的居民拥有2辆汽车，如果家庭年收入超过$ 25,000的概率为80％。在接受调查的家庭中，有60％的收入超过25,000美元，70％有2辆汽车。1，一个家庭拥有2辆汽车和居民收入低于或等于25,000美元的概率是________2。probablity，家庭年收入超过$ 25,000，如果一个家庭拥有2辆汽车的居民是_______的概率，家庭年收入超过$ 25,000，如果居民没有自己的房子保持的2辆汽车，介绍文章的主旨

Answer 2

根据一项调查的美国家庭，概率的居民拥有2辆车如果家庭年收入超过25000美元的80%。调查的家庭收入超过25000美元，有60%和70%有2辆车。1.the概率的居民家庭拥有2辆汽车，有一个收入小于或等于25000a美元一年________ 2.the概率，家庭年收入超过$ 25000if居民家庭拥有2辆汽车_______ 3.the概率，家庭年收入超过25000元，如果房价的房子保持不拥有2辆汽车is____