21. T F Unlike testimony, which can easily be quoted out of context, statistics are difficult to manipulate for biased purposes. 22. T F The mean—popularly called the average—is determined by summing all the items in a group and dividing by the number of items. 23. T F The median is determined by summing all the items in a group and dividing by the number of items. 24. T F The median is the middle number in a group of numbers arranged in order from highest to lowest. 25. T F The mode is the number that occurs most frequently in a group of numbers. Â
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