From generation to generation, the mean age when smokers first start to smoke varies. however, the standard deviation of that age remains constant at around 2.1 years. a survey of 44 smokers of this generation was done to see if the mean starting age is at least 19. the sample mean was 18.1 with a sample standard deviation of 1.3. do the data support the claim at the 5% level?

i dont know

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

111

step-by-step explanation:

y + 11 = (1/4)(x + 16)

step-by-step explanation: