The same sample of 25 seniors from the urban school district with the mean and standard deviation n(450, 100). a 95% confidence interval for µ for the population of seniors with a margin of error of ± 25 is used. what is the smallest sample size we can take to achieve this same margin of error?

26

45

50

62

69

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.

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