An analyst does research about common probability. A return distribution has a mean of 1.8% and a variance of 2.25. If returns are normally distributed, the probability of observing a return value less than -1.2% is closest to:（） A: 1.0% B: 2.5% C: 5%

中国大学MOOC: A deductive argument features certainty, and an inductive argument features probability.

______ is called probability neglect.

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?

Two events are mutually exclusive if( ) A: the<br/>probability of their intersection is 1. B: they have no sample points in common. C: the<br/>probability of their intersection is 0.5. D: the<br/>probability of their union is 1 and they have no sample points in<br/>common.

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 _______.

Which of the following sentences indicates “probability”?

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%.

Which of the following words CANNOT express probability?

The probability of committing a Type II error is represented by _______.