单项选择题
A.0.7
B.0.3
C.0.4
D.1.0
单项选择题 The student body of a large university consists of 60%female students.A random sample of 8 students is selected.What is the probability that among the students in the sample exactly two are female?()
单项选择题 A weighted average of the value of a random variable, where the probability function provides weights is known as()
单项选择题 A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is()