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[DOC File]When to Use the T-Distribution vs - Portland State University
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You must use the t-distribution table when working problems when the population standard deviation (σ) is not known and the sample size is small (n
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[DOC File]Z-Score Practice Worksheet
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Find the range of values that defines the middle 80% of the distribution of SAT scores (372 and 628). Find the z-scores - -1.28, 1.28. For a normal distribution, find the z-score that separates the distribution as follows: Separate the highest 30% from the rest of the distribution. .52. Separate the lowest 40% from the rest of the distribution. .25
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[DOC File]Chapter 5, Probability Distributions
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Continuous probability distribution is used when the sample space is continuous. Following is a list of continuous probability distributions: Uniform. Normal (or Guassian) Gamma. Beta. t distribution. F distribution (2 distribution. 5.2 Discrete uniform distribution
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[DOC File]Inferences for a Single Population Mean ( )
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(estimate) + (table value) * SE(estimate) For the population mean ( ) we have, or . The appropriate columns in a t-distribution table for the different confidence intervals are as follows: 90% Confidence look in the .05 column (if n is “large” we can use 1.645) 95% Confidence look in the .025 column (if n is “large” we can use 1.960)
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[DOC File]www3.nccu.edu.tw
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A 40. The table t value associated with the upper 10% of the t distribution and 23 degrees of freedom is _____. E A. 1.319. Calc B. 1.714. C. 2.069. D. 1.321 B 41. The table t value associated with the upper 1% of the t distribution and 5 degrees of freedom is _____. E A. 4.032. Calc B. 3.365. C. 3.747. D. 1.476. A 42. The table t value ...
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[DOC File]Cumulative Poisson Probability Distribution Table
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Cumulative Poisson Probability Distribution Table Author: Susan Fry Last modified by: Susan Fry Created Date: 7/23/2004 8:54:00 PM Company: Fry & Fry Consultants Other titles: Cumulative Poisson Probability Distribution Table
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[DOC File]Statistics - Dearborn Public Schools
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4) The total area under a t-curve is ____ or _____. 5) The mean, median, and mode of the t-distribution are equal to _____. 6) As the _____ increase, the t-distribution approaches the _____. After 30 d.f., the t-distribution is very close to the _____. Table 5 on pg A18 (or on the foldout chart) is used to find the critical values for the t ...
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[DOC File]www.occc.edu
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-recall that all the t-values are larger than the z-values so it makes it more difficult to reject the null. 2. Read the t statistic from the table of t distributions and circle the correct answer. A two-tailed test, a sample of 20 at a .20 level of significance; t = a. 1.328. b. 2.539. c. 1.325. d. 2.528. ANSWER: a
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[DOC File]ww2.justanswer.com
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Oct 04, 2010 · we need to use the t- distribution. We make the assumption that the . sample drawn is random and is the number of eggs is normally distributed. (c) The degrees of freedom for the t- test is 20 - 1 = 19. The value of t for 95% confidence is ± 2.0930.
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T distribution table