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Standard Deviation - Quick Introduction
The standard deviation is the average variation of the data values from the mean of the values and is the most commonly used measure of variation. Note that the values for the standard deviation are different for a sample and a population.
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[DOCX File]Weebly
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As a result, she has investigated the weekly tips of a randomly selected group of 150 waiters and waitresses and has found the mean to be $104. Assuming that the population standard deviation is $22, calculate the p-value of the test to determine whether there is enough evidence to support the tax accountant's assertion.
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[DOC File]Review Outline for Exam 1 (Psy340, Fall 03)
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Statistics and Probability: Interpreting Categorical & Quantitative Data Dotplots, Histograms, Boxplots SID 1 Interpreting Stats, Mean, Median, Spread, Quartile, Range, Standard Deviation SID2
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[DOC File]Lab 7: Hypothesis Testing - Rice University
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The parallel histograms show that distributions of heights to be mound shaped and fairly symmetrical (approximately normal) in shape. Therefore, the data can be succinctly described using the mean and standard deviation. Heights for males and females have means of 70.4 inches and 64.7 inches.
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[DOC File]Unit II - wsfcs.k12.nc.us
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Instruction should include use of the following features: creating and editing lists; calculating sample mean, median, and standard deviation; histograms; modified boxplots; normal probability plots. Instructors may prohibit use of the TI-89; Excel is optional.
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[DOC File]Grade Level: Unit:
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Data distributions are shown for the taste quality of a farm’s red apples at different points in time during the harvest season.Which summary statistics would be best to use to compare the two data sets and why?A.The median and the interquartile range because the data sets are normally distributed.B.The mean and standard deviation because the data sets are normally distributed.
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[DOCX File]Describing and Interpreting Data - UH
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The standard deviation is found by taking the square root of the variance, and the standard deviation is more useful than the variance in reporting results so it is the measure that is typically reported. The Empirical Rule. Apply this rule to interpret the measures when the data is symmetrical. At least: 68% of the data values are within one ...
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[DOC File]Graphs used for categorical/qualitative data
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Interpreting histograms and frequency polygons (in terms of skewness, number of modes, etc.) Unimodal, bimodal, multimodal distributions – what do they look like? ... Standard deviation – what is the concept/interpretation of standard deviation? Be familiar with how to find it …
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[DOCX File]High School Cluster Quiz Interpreting Data
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Interpreting Graphs and Statistics. Day 1 – Intro & Info -Class Notes Central Tendency and Histograms – WS Central Tendency. Day 2 – Finish Histograms – WS Histograms. Day 3 – Math Lab – Investigation 1 “ Shapes of Distributions” page 76 & Math Lab – Investigation “Measures of Center” page 83
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Interpreting histograms standard deviation