These box plots show daily low temperatures for a sample of days in two different towns
Town A
10 15 20
30
55
*
Town B
5
40
55
5
10
SO 55 60
15 20 25 30 35 40 45
Degrees (F)
Which statement is the most appropriate comparison of the centers?
O A The median for town A 20°, is less than the median for town B,
30*
B. The median temperature for both towns is 30°.
O C. The median for town A 30', is less than the median for town B,
40
OD. The mean for town A 20', is less than the mean for town B, 30'.
PREVIOUS

answer: procent 54 wynosi 33,33%

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.