Professional Development Presentation- Descriptive Statistics

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Grand Canyon University *

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556

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Statistics

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Feb 20, 2024

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pptx

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Professional Development : Descriptive Statistics Professional Development : Descriptive Statistics Chelsea Badey Grand Canyon University SPD 556 Chelsea Badey Grand Canyon University SPD 556
Descriptive Statistics Descriptive Statistics Summarize the sample studied without making inferences based on probability theory. Can be used to describe a single or multiple variables. Summarize the sample studied without making inferences based on probability theory. Can be used to describe a single or multiple variables.
Reliability vs. Validity Reliability vs. Validity Reliability is the degree to which an assessment tool produces stable and consistent results. Validity refers to how well a test measures what it is supposed to measure.  Reliability is the degree to which an assessment tool produces stable and consistent results. Validity refers to how well a test measures what it is supposed to measure. 
Test Bias Test Bias Test bias is the differential validity of test scores. Bias is a systematic error in the process of measurement that influences scores for identified groups. These tests are taken by students in a specific group that are disadvantaged. Produce negative results and an invalid evaluation. Test bias is the differential validity of test scores. Bias is a systematic error in the process of measurement that influences scores for identified groups. These tests are taken by students in a specific group that are disadvantaged. Produce negative results and an invalid evaluation.
Bell Curve Bell Curve A bell curve is a graph that shows the typical distribution of information, and the shape is similar to a bell. Shows percentages of students who test. Shows progress or lack thereof. A bell curve is a graph that shows the typical distribution of information, and the shape is similar to a bell. Shows percentages of students who test. Shows progress or lack thereof.
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