# STATISTICS AND PROBABILITY QUESTIONS.docx - STATISTICS AND...

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STATISTICS AND PROBABILITY - Which of the following statement is TRUE.
- What is the probability distribution of occurring the all heads in a toss of three coins?
- The speed of cars travelling in the road and the water consumption of household are examples of
- The standard deviation of a discrete random variable is ∑ (x) p(x – μ)
- Countless number of values are also known as
- This tells what the possible values of X and how probabilities are assigned to these values.
- if the outcomes are disjoint, then the probability of either event is the sum of the probabilities of the two events:
- The sum of all the probabilities P(X = x) for all possible values of a discrete random variable X must equal 1.
- Which one of these variables is a not continuous random variable?
- A continuous random variable can take on any values within a continuous range or an interval.
- How many possible outcomes when you simultaneously toss three fair coins
- if the outcomes are independent, you can add the probabilities of each outcome.
- Mean is the sum of all possible values of random variables.
- The Greek letter alpha represents the mean
- To determine the value of the mean, multiply each possible outcome of the random variables X by its associated probability and the take the sum over all possible values of X.
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