Quiz 2- Lecture 3 Flashcards
,the graphical representation of the data can help us find the …
location and shape of the distribution
measure of center
measure along the HORIZONTAL axis that locates the CENTER of the distribution
Arithmetic mean
the sum of data points of interest divided by the NUMBER OF DATA POINTS
median
the m of a set of n measurements is the value of x that falls in the middle position when the measurements are ordered from smallest to largest
mean and median
DO NOT always coincide with each other
mean and median are the same
the distribution is SYMMETRIC
mean is LARGER than the median
skewed to the right
mean is SMALLER than median
skewed to the left
modal class
when measurements on a continuous variable have been grouped as a frequency or r.f histogram, the class with highest frequency is this
mode
the category that occurs most FREQUENTLY, or the most frequently occurring value of x
mode is generally used to describe a …
large data set
mean and median can be used for both…
small and large datasets
measures of ____ can help you create a mental picture of the spread of the data
variability
set of n measurements that is defined by as the difference between the largest and smallest measurements
range, R
the_____ of a population of N measurements is the average of the squares of the deviation of the measurements about the ____
variance, mean
