Determine whether the data collected represents a population or a sample. The income distribution of the top 10% of wage earners in the United States is determined using data from the Internal Revenue Service.

Sample

Step-by-step explanation:

A sample simply means a randomly selected number of observations culled from a particular population of interest, so they the data points can be a smaller representation of the population observation. In the scenario above, a small fraction of about 10% of the top earners is to be sampled from a larger population of all earners in the United States.

Therefore. The entire United States earners refers to the population distribution of workers while a representative data such as the one taken above is called a sample.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6