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The median of a discrete random variable X: The value of X such that P(X ≤ x) ≥ 0.5 and P(X ≥ x) ≥ 0.5The variance of a discrete random variable X: σ2 X = ∑ x i - μ x 2 p i The standard deviation of a discrete random variable X: σ X = σ x 2 Calculator Tip: The mean and standard deviation of a probability distribution can be ...
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[DOC File]Standard deviation - 清華大學物理學系
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The standard deviation is the most common measure of statistical dispersion, measuring how widely spread the values in a data set are. If the data points are close to the mean, then the standard deviation is small. As well, if many data points are far from the mean, then the standard deviation is large.
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[DOC File]CHAPTER 14: DESCRIPTIVE STATISTICS
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standard deviation. of a data set is the “average deviation from the mean.” σx – The lower case Greek letter σ is used to represent the standard deviation of a population data set. Sx – The lower case s is used to represent the standard deviation of a sample data set. Calculating standard deviation is a multi-step process.
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[DOC File]Wednesday, August 11 (131 minutes)
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Use your calculator to calculate and interpret the standard deviation of X in the languages example. = 0.450. The standard deviation of X is . Are there any dangers to be aware of when using the calculator to find the mean and standard deviation of a discrete random variable? Must show some work to get credit. First couple of terms is fine.
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[DOC File]MATH 160 - CHAPTER 1
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Probability Distribution of General Discrete Variable [Sec 6-1] 2 Characteristics [Sec 6-1] Mean of a Discrete Random Variable. Standard Deviation of a Discrete Random Variable . Factorials & Combinations & Permutations [Sec 5-4] Binomial Probability Distribution [Sec 6-2] Mean & Standard Dev. of the Binomial Distribution. Poisson Probability ...
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[DOC File]Using The TI-83 to Construct a Discrete Probability ...
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To leave the discrete probability distribution, press 2nd QUIT. To find the mean (expected value) and standard deviation, press the STAT key, highlight CALC using the arrow keys and then select the 1-VAR STATS option (#1). Then enter L1, L2. Remember L1 is x and L2 is P(x). Press ENTER to view the descriptive statistics.
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[DOC File]The Practice of Statistics
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random variable . discrete random variable probability model. expected value standard deviation. continuous random variable Calculator Skills: 1-VarStats L1, L2 What is meant by a random variable? Explain the difference between a discrete random variable and a continuous random variable. What information does a probability model give?
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Standard deviation of discrete variable calculator