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Earn +20 ptsQ: Single number commonly used to describe the variation in a data distribution?
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What is the shape of the distribution of the mean of a sample?
The mean of a sample is a single value and so its distribution is a single value with probability 1.
What is the expected value of this distribution if the probability of success on a single trail is 0.5?
This is the answer.
Normal distribution is symmetric with single peak.Does this mean that all distibutions are normal?
No, not all distributions are symmetrical, and not all distributions have a single peak.
How do you differentiate a Poisson distribution and a binomial one in a level qns?
The Poisson distribution is characterised by a rate (over time or space) of an event occurring. In a binomial distribution the probability is that of a single event (outcome) occurring in a repeated set of trials.
What is a single number used to describe a set of data mean median mode?
2,5,4,5
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