Sample : 2500 males of which the information is collected
Parameter : Median income of males in the U.S
Statistic : Median income of the 2500 males sampled
Any quality, amount, or number that can be gauged or tallied qualifies as a variable. A data item is another name for a variable.
A sample is a subset of units chosen to represent all the individuals in a population. Because just a portion of the population was counted, it is only a partial enumeration. To estimate the characteristics of the total population of interest, data from the sampled units is used.
A statistic is a numerical representation of a sample, whereas a parameter is a numerical representation of the entire population.
The slope of a line is given by the change in y coordinates over the change in x coordinate. The slope of line DE will be (4 - -3)/ (7-1) = 7/6 If M1 and M2 are slopes of two perpendicular lines at a point then M1× M2 = -1 Thus, the slope of a perpendicular to line DE will be -6/7.
