题目

(2019·广东省惠州市高三第一次调研考试)China will give the green light to Internet medical services conducted by medical institutions as part of a broader push to promote Internet Plus Healthcare, which was decided at a State Council executive meeting held by  Premier Li Keqiang. Medical institutions will be allowed to provide online diagnostic services for patients with common and chronic diseases in their follow­up visits to their doctors. The top levels of hospitals will be encouraged to provide online services, including consultations (会诊), reservations and test（本小题满分分）有甲、乙两个班，进行数学考试，按学生考试及格与不及格统计成绩后，得到如下的列联表 不及格 及格 总计 甲班 10 35 M 乙班 7 38 45 总计 17 73 N （1）   求M,N的值 （2）   写出求k观测值的计算式 （3）   假设k=0.6527你有多大把握认为成绩及格与班级有关？        k=7.121又说明什么？ （P（k）0.100，P（k）0.010）