Mean - The average of all scores, calculated by adding up all scores and dividing that total by the number of scores., Median - The middle number (or mean of the two middle numbers) of a number series listed in numerical order., ode - The most commonly occurring score in the dataset., Range - The difference between the highest score and the lowest score in the dataset., Variance - A measure of how much, on average, the scores differ from the mean., Standard deviation - A measure that tells us how far, on average, scores are different from the mean., P-value - The probability that the difference is caused by chance., Conclusion - The final decision about what the results mean, stated in terms of the original hypothesis (rejected or supported)., Correlation - A statistical measure of the strength and direction of the relationship between two variables; does not show a cause and effect relationship, but describes the way in which the variables vary in relation to each other., Positive correlation - One in which the two variables change in the same direction - that is, as one increases (or decreases), so does the other., Negative correlation - One in which the two variables change in the opposite direction - that is, as one increases, the other decreases., R value - A correlation coefficient indicating the strength and direction of the relationship between two variables, expressed as a decimal number in the range of -1.0 < r < +1.0., Statistical significance - Achieved when the p-value is less than or equal to 0.05.,

Statistics and data revision

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