In pennsylvania the average iq score is 101.5. the variable is normally distributed, and the population standard deviation is 15. a school superintendent claims that the students in her school district have an iq higher than the average of 101.5. she selects a random sample of 30 students and finds the mean of the test scores is 106.4. test the claim at = 0.05

maybe - definition of supplementary angles. im not sure. sorry

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

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3