Standard deviation calculator with probability

• [DOC File]Hewlett-Packard 10BII

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  Example 18: Population mean and standard deviation. With the data stored in the calculator as shown above, we can find the expected return (mean, or average) and the standard deviation (() with these keystrokes: GOLD , which gives the mean, or expected, return, 12.00%. GOLD σx, σy , which gives the standard deviation, 17.60%.

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• [DOC File]Topic 18: The Central Limit Theorem

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  a) Use the Central Limit Theorem to approximate the probability that you win in 10% or fewer of those 10 games. [Big Hint: Find the mean and standard deviation of the sampling distribution. Then use z-scores and the normal probability table or the normalcdf( command on your calculator to find the probability.]

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• [DOC File]Probability Distributions

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  Standard Deviation = What do you notice about your solutions to parts b and c? Use the binomial table and graph for n = 5, p = 0.50 to answer the following: What is the shape of the binomial distribution when p = 0.50? Use the binomial table and your TI-calculator to find the mean and standard deviation of this binomial probability distribution.

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• [DOCX File]University of Arizona

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  From table or calculator the 90th percentile for standard normal distribution is at z=1.2816. So answer is 90 + 1.2816*38 mg/dL =138.7 mg/dL Suppose that the “abnormal range” is defined to be glucose levels which are 1.5 standard deviations above the mean or 1.5 standard deviations below the mean.

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• [DOC File]Math 227 Statistics

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  The following table lists the probability distribution of x. X P(x) 0 0.73 1 0.16 2 0.06 3 0.04 4 0.01 Find the mean. Find the standard deviation. Find the probability that the number of errors on a selected page of a book is at most 1. (5 pts) Suppose you draw 3 cards without replacement from a standard 52-card deck.

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• [DOC File]Calculating Probability

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  Mean and Variance of a discrete r.v. with probability distribution. The mean (The mean of a r.v. is also called as the . expected value.) The variances . The standard deviation = Ex. Toss a coin twice, x = # of heads. Find and . The probability distribution is . x 0 1 2 P(x) 0.25 0.5 0.25 (the number of heads we can expect to get if we toss a ...

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• [DOC File]Expectation

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  2. Find the mean, variance, and standard deviation for the number of heads when 10 coins are tossed. 3. If 2% of automobile carburetors are defective, find the mean, variance, and standard deviation of a lot of 500 carburetors. 4. It has been reported that 83% of federal government employees use email.

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• [DOC File]Standard deviation - 物理學系

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  In probability and statistics, the standard deviation of a probability distribution, random variable, or population or multiset of values is a measure of the spread of its values. It is usually denoted with the letter σ (lower case sigma).

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• [DOC File]MAT 155 – Lab 11

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  Find a 95% confidence interval for the probability that a viewer of BPBS selected at random contributes to the station. To start this problem – you must know that you are finding a confidence interval for a proportion. (One way to tell this by elimination is that there is no mean or standard deviation given).

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• [DOCX File]Calculating the Standard Deviation - Anne Gloag's Math Page

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  Calculating the Standard Deviation. If x is a number, then the difference "x - mean" is called its deviation. In a data set, there are as many deviations as there are items in the data set. The deviations are used to calculate the standard deviation. If the numbers belong to a population, in symbols a deviation is x − μ .

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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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• [DOCX File]IB Questionbank Test

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  The heights of apple trees in an orchard are normally distributed with a mean of and a standard deviation of . a.Write down the probability that a randomly chosen tree has a height greater than . Markscheme (A1) (C1) [1 mark] b. Write down the probability that a randomly chosen tree will be within 2 standard deviations of the mean of . Markscheme

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• [DOC File]Problem 1:

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  State of the Economy Probability RA RB Boom 10% –2% Recession 6% 40% Calculate the expected return for stock A and stock B. Calculate the total risk (variance and standard deviation) for stock A and for stock B. Calculate the expected return on a portfolio consisting of equal proportions in both stocks.

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• [DOC File]HCPS Blogs

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  The standard deviation of T is (c) Let denote the total amount of money spent per purchase. The mean of M is . The standard deviation of M is . Solution – 2004 Question 4 (a) Let A be the event “antibiotic A works” and let B be the event “antibiotic B works.” The probability that a child will be cured with plan I is:

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