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[DOC File]Using The TI-83 to Construct a Discrete Probability ...
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TI-83/84 Discrete Probability Distributions. You can use the TI-83/84 calculator to graph a discrete probability distribution as well as find the mean (expected value) and standard deviation of a discrete random variable. Example: The manager of the Elmwood Café has a staff of six wait-persons on weekend evening shifts.
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[DOC File]Random Variable
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Random variable X has a mean of 6.2 and a standard deviation of 3.1. Find the new mean and standard deviation if we multiply by 3. Find the new mean and standard deviation if we subtract 10. Find the new mean and standard deviation if we multiply by 5 and add 10. Random variable Y has a mean of 3.4 and a standard deviation of 1.4.
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[DOC File]Standard deviation - 清華大學物理學系
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If the random variable X takes on the values (which are real numbers) with equal probability, then its standard deviation can be computed as follows. First, the mean of X, , is defined as a summation: where N is the number of samples taken. Next, the standard deviation simplifies to. In other words, the standard deviation of a discrete uniform ...
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[DOC File]Chapter Five - Miami Dade College
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The standard deviation of a discrete random variable x measures the spread of its probability distribution. It is denoted by and is calculated as . ... The mean and standard deviation of x are: calculator. calculator. P(exactly 2) = P(2) = .0746. 5.69 a. Here, n = 8 and p = .70.
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[DOC File]The Practice of Statistics
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Chapter 16: Random Variables. Key Vocabulary: 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.
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[DOCX File]Lakey's AP Stats
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Are there any dangers to be aware of when using the calculator to find the mean and standard deviation of a discrete random variable? Example: A large auto dealership keeps track of sales made during each hour of the day. Let X = the number of cars sold during the first hour of business on a randomly selected Friday.
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Standard deviation of discrete random variable calculator