If a set of grades for a class has a large range and a small standard deviation, what can you say about the class? Include an interpretation that is specific

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Please discuss the concepts of Mean, Median, Mode, and Standard Deviation, including when each should be used, and evaluate the differences of each. How can knowing this information about data help us?

Is the mean the measure of central tendency that makes the sum of squared deviations around it minimal?

Suppose you work in the personnel department of a firm that just finished training a group of its employees and you have been requested to review the performance of the trainees on their final examination. The mean and standard deviation of the test scores are 80 and 5. Additional information indicated that the median of the test scores was 75. What type of distribution most likely describes the shape of the test scores? Skewed left Symmetric O There is not enough information to answer this question. O Skewed right

When you have significant results in data analysis, it is customary to report all relevant means and standard deviations.   True or false