26. Students who take a statistics course are given a pre-test on the concepts and skills for the first chapter of a statistics course. Then they are given a post-test once the professor has concluded lecturing on the material Pre-test and post-test
scores for 4 students in an elementary statistics class are given below. Can it be concluded that the test scores have
improved? The standard deviation is 6.02. Use a = .05.
Pre-test
65 70 75 84
Post-test
80 82 85 85
Difference 15 | 12 101
a Hypotheses:
b. Test Statistic.

your answer would be 10x - 1

168

step-by-step explanation:

i am pretty sure that the answer is 168

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