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[DOC File]Lecture 3: Introduction to Probability
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The standard deviation of the sampling distribution of is the population standard deviation divided by the square root of the sample size n. In symbols, . Shape of sampling distribution. If the population distribution is normal, then the sampling distribution of is normal, regardless of n.
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[DOC File]Standard deviation - 物理學系
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1.1 Standard deviation of a random variable. The standard deviation of a random variable X is defined as: where E(X) is the expected value of X. Not all random variables have a standard deviation, since these expected values need not exist. For example, the standard deviation of a random variable which follows a Cauchy distribution is undefined.
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[DOC File]Chapter 11 2nd Edition - Tarleton State University
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standard deviation. of is . The . distribution. of is normal. Thus, is . ... Finding Areas under a t-distribution using the TI. ... The first sample is a random sample from a normal population with mean 1 and standard deviation . The second sample is a random sample from a normal population with mean 2 and standard deviation . The two samples ...
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[DOC File]Topic 15:
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standard deviation. The mean determines where its center is; the peak of a normal curve occurs at its mean, which is also its point of symmetry. The standard deviation indicates how spread out the distribution is. [Note: We reserve the symbols and s to refer to the mean and standard deviation computed from sample data.]
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Finding std deviation of random distribution