9a Scaling and coding MEI
... "Certain images and/or photos on this presentation are the copyrighted property of JupiterImages and are being used with permission under license. These images and/or photos may not be copied or downloaded without permission from JupiterImages" ...
... "Certain images and/or photos on this presentation are the copyrighted property of JupiterImages and are being used with permission under license. These images and/or photos may not be copied or downloaded without permission from JupiterImages" ...
variability
... • Variance and standard deviation are mathematically related to the mean. They are computed from the squared deviation scores (squared distance of each score from the mean). • Median and semi-interquartile range are both based on percentiles and therefore are used together. When the median is used t ...
... • Variance and standard deviation are mathematically related to the mean. They are computed from the squared deviation scores (squared distance of each score from the mean). • Median and semi-interquartile range are both based on percentiles and therefore are used together. When the median is used t ...
Slide 1
... In a study, we collect information—data—from individuals. Individuals can be people, animals, plants, or any object of interest. A variable is any characteristic of an individual. A variable varies among individuals. Example: age, height, blood pressure, ethnicity, leaf length, first language ...
... In a study, we collect information—data—from individuals. Individuals can be people, animals, plants, or any object of interest. A variable is any characteristic of an individual. A variable varies among individuals. Example: age, height, blood pressure, ethnicity, leaf length, first language ...
Regression
... 1. The relationship between the two variables must be linear. This assumption must be checked. 2. The results are affected by outliers. When interpreting the results, researchers must look at more than just the regression coefficients that have been computed by statistical software. 3. The data shou ...
... 1. The relationship between the two variables must be linear. This assumption must be checked. 2. The results are affected by outliers. When interpreting the results, researchers must look at more than just the regression coefficients that have been computed by statistical software. 3. The data shou ...
2.1 answers
... 2.18 To make the mean change from 68 to 0, Mr. Olsen should subtract 68 from each score. This will make the mean equal to 68 – 68 = 0 and not change the standard deviation. To make the standard deviation change from 15 to 1, divide each adjusted score by 15. This will make the mean equal to 0/15 = 0 ...
... 2.18 To make the mean change from 68 to 0, Mr. Olsen should subtract 68 from each score. This will make the mean equal to 68 – 68 = 0 and not change the standard deviation. To make the standard deviation change from 15 to 1, divide each adjusted score by 15. This will make the mean equal to 0/15 = 0 ...
MEASURES OF SPREAD 24 Topic 5:
... A very simple, but not particularly useful, measure of variability is the range, calculated as the difference between the maximum and minimum values in the data. Another measure of variability is the interquartile range (IQR), the difference between the upper quartile and the lower quartile of the d ...
... A very simple, but not particularly useful, measure of variability is the range, calculated as the difference between the maximum and minimum values in the data. Another measure of variability is the interquartile range (IQR), the difference between the upper quartile and the lower quartile of the d ...
Document
... 1) The standard deviation measures spread about the mean and should be used only when the mean is chosen as the measure of center. ...
... 1) The standard deviation measures spread about the mean and should be used only when the mean is chosen as the measure of center. ...
Answers Measures Handout
... Standard deviation for Brianna: 0.5 = 0.707 8) What do these measures of spread tell you about Brianna’s grades? All of these values tell you how your data deviates from the mean. In this case, the ...
... Standard deviation for Brianna: 0.5 = 0.707 8) What do these measures of spread tell you about Brianna’s grades? All of these values tell you how your data deviates from the mean. In this case, the ...