In 1986, two research groups sampled consumers on the driving performances of the Dodge Colt versus the Plymouth Champ in a blind road test: that is the consumer did not know if they were driving the Colt or the Champ. However, these cars were identical and only their marketing varied. One research group (A) sampled 66 consumers each day for 60 days (a large number of days to control for weather and other variables), while the other research group (B) sampled 22 consumers each day for 50 days. Which consumer group observed more days in which 60% or more of the consumers tested preferred the Dodge Colt:

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

step-by-step explanation:

no of data

divide by no of mode

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

ab will be equal to