MMW

raw data

data collected in original form

range

difference of the highest value and lowest value in a distribution

frequency distribution

the easiest way and widely used of organizing data

class limits

the highest and lowest values describing a class

frequency distribution

the organization of data in a tabular form

class boundaries

the upper and lower values of a class flwhose values has additional decimal place more than the class limits and ends with digit 5

frequency

the number of values in a specific class of a frequency distribution

percentage

obtained by multiplying the relative frequency by 100%

cumulative frequency

the sum of the frequencies accumulatedup to the upper boundary of a class in a frequency distribution

midpoint

the point halfway between the class limits of each class

grouped frequency distribution

this is used when the set of data is large; the data must be into classes whether it is categorical or interval

measure of central tendency

also known as average, a single value that represents a data set. Its purpose is to locate the center of a data set.

mean median mode

3 different measures of central tendency

mean

most frequently used measure of central tendency. to determine its values you would need to consider all the values of given data set

mode

it is the value that appears frequently in a data set

standard deviation

statistical term that provides a good indication of votality. it measures how widely values are dispered from the averaged. calculated by taking the square root of the variance

variance

mathematical expectation of the average squared deviations from the mean

votality

this is a measure of risk

measure of relative position

tells where data values fall within the ordered set

normal distribution

continuous, symmetric, bell shaped distribution of a variable