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[DOCX File]Obtaining Exact Significance Levels With SAS
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p. values for specified probability distributions. The Standard . Normal. Distribution. First we are going to find the lower-tailed . p. value for a . Z. score of 1.96. SPSS will not let us use the COMPUTE function, which is employed to find . p. values, without having a data set open, so we shall make a …
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[DOC File]Z-Score Practice Worksheet
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Find the z-scores corresponding to each of the following values: A score of 60, where the mean score of the sample data values is 40. Z=2. A score that is 30 points below the mean. z=-3. A score of 80, where the mean score of the sample data values is 30. Z=5. A score of 20, where the mean score of the sample data values is 50. Z=-3
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[DOC File]ST 361 Normal Distribution
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Want to find z* such that P[Z z*] = 0.025, or P[Z z*] = 0.975. The value of z* = 1.96. Ex3. Consider a standard Normal r.v . Z~N(0,1). At what value of z*, the area between –z* and z* is 68%? P[-z* Z z*] = 0.68 P[Z - z*] = (1 - 0.68)/2 = 0.16 - z* = - 0.995, z = 0.995. III. General Normal Distribution
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[DOC File]Power and Sample Size Calculation
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We will use an example to illustrate how a researcher can calculate the sample size needed for a study. Given that a researcher has the null hypothesis that μ=μ0 and alternative hypothesis that μ=μ1≠ μ0, and that the population variance is known as σ2. ... Therefore, the power function will be P{Z> Zα/2 or Z< -Zα/2|μ1}=1-Φ[Zα/2 ...
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[DOC File]How to calculate a P-value using a t value
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Calculate will display z, the P-value, p1-hat, p2-hat, p-hat (the pooled sample proportion estimate) plus the input values. Therefore Draw is better, unless you need to know p1-hat, p2-hat or p-hat. Chi2 2-way. Chi2 2-way conducts a chi-square test for association on a 2-way table of counts p. 160.
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[DOC File]Columbia University in the City of New York
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H0: p = 0.5 HA: p ( 0.5 Calculate Test Statistic: z. p-value: p-value This null hypothesis can be rejected at any value of ( (significance level) greater than 20.76%. 7. The MATWES procedure was designed to measure attitudes toward women as managers. High scores indicate negative attitudes and low scores indicate positive attitudes.
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[DOC File]X ~ N(10,3)
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Calculate and compare Z-scores (we did this in chapter 2; chapter 6 re-examines this concept) Angie Beth Compare percentiles. for Angie and Beth by calculating probabilities using their actual GPAs. Angie: Find P(X < 26.2) for X~N(27.2, 0.8) Beth: Find P(Y < 27.3) using Y~N(30.1, 1.4) Compare percentiles. for Angie and Beth by calculating ...
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[DOC File]Calculating Probability
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For any probability distribution P(x), (recall the axiom of probabilities…) Ex. (1) Find the value of c so that the following function is a probability distribution of a r.v. x:
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[DOC File]Math 243 - Portland Community College
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Now, I will calculate P(Z > 0.45) and look at my table. P(Z > 0.45) = 0.3264. When I looked for the z-score on the table I just looked for z = –0.45 since I wanted the area above z = 0.45. It turns out that the area below z = –0.45 is the same as the area above z = 0.45.
convert z value to p value

Calculate p from z