Twenty-five items are sampled. Each of these has the same probability of being defective. The probability that exactly 2 of the 25 are defective could best be found by _______.
举一反三
- A full binary tree is a tree where________________.( ) A: each node has exactly one or two children. B: all the leaves are at the same level. C: each node has exactly two children D: each node has exactly zero or two children.
- The probability of each of three independent events is shown in the table below. What is the probability of A and C occurring, but not B（） A: 15% B: 42% C: 8.9%.
- The probability of receiving a 911 call on a university campus is the same every day. The probability of having received a 911 call on a single day does not change the probability of receiving a 911 call on any other day. Which of the following distributions would you use to determine the probability that a 911 call will be received next day?
- 180300d3c5444f6.png means that A: for a binary variable model, the predicted value from the population regression is the probability that [img=44x19]180300d3cee75d7.png[/img], given [img=15x19]180300d3d69dded.png[/img]. B: dividing Y by the X's is the same as the probability of [img=11x19]180300d3de9af85.png[/img] being the inverse of the sum of the [img=15x19]180300d3e7357fb.png[/img]'s. C: the exponential of Y is the same as the probability of Y happening. D: you are pretty certain that Y takes on a value of 1 given the X's.
- 请选出25%的读法 A: two five percent B: twenty five percent C: twenty five percents D: two five percents