Mary's test grades were 77, 85, 77, 82, and 80. Mary's teacher recorded one of her grades incorrectly. Instead of an 85, Mary's second test score should have been a 58. Which measure(s) of central tendency is NOT affected by this change?

mean

median

mode

mean and median

Question

Mary's test grades were 77, 85, 77, 82, and 80. Mary's teacher recorded one of her grades incorrectly. Instead of an 85, Mary's second test score should have been a 58. Which measure(s) of central tendency is NOT affected by this change?

mean

median

mode

mean and median

anonymous · Answer

http://www.purplemath.com/modules/meanmode.htm So, the mean is the average. Median is the middle value. Mode is the most common number.

anonymous · Answer

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