External factors typically include（）
A. market trends
B. economic trends
C. funding
D. demographic changes
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What elements should be taken into consideration when it comes to making product decisions（）
A. Product design
Branding
C. Product life cycle issues
D. Product quality
Which of the following statements about the probability is WRONG（）
A. Probability is the measure of the likelihood that an event will occur
B. Any probability takes value from the interval [0,1]
C. The frequency of an event E is exactly the probability of the event E
D. The event with probability of 0 is called an impossible event
E. In practice, the probability is difficult to be obtained
Which of the following statements about probability is WRONG（）
A. Probability is the measure of the likelihood that an event will occur
B. The value of a probability lies in the interval of [0,1]
C. The frequency of an event E is exactly the probability of the event E
D. An event with probability of 0 is called an impossible event
E. In reality, probability is difficult to obtain
To make a statistical inference for the population from a sample, the sample should be（）
A. the most typical part of the population
B. any part of the population
C. the most meaningful part of the population
D. the most explicit part of the population
E. a part randomly selected from the population
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