<em>Three measures of central tendency are the mode, the median and the mean. The mean can only be used with interval/ratio level data. Measures of variability are numbers that describe how much variation or diversity there is in a distribution.</em>
Three measures of central tendency are the mode, the median and the mean. The mean can only be used with interval/ratio level data. Measures of variability are numbers that describe how much variation or diversity there is in a distribution.
"Cognitive development is the construction of thought processes, including remembering, problem solving, and decision-making, from childhood through adolescence to adulthood."
