Some people believe that math ability and musical ability have a relationship — that is, people with musical ability also seem to do well in math. A group of

researchers decides to test this theory. The researchers randomly select 100

musically gifted individuals and also 150 individuals with no musical talent.

Each individual is given a test for math ability. The results are shown below

. Run an appropriate test to see if the mean math-ability score for those who

are musically gifted is significantly higher than that of those who are not

musically gifted. Use a 1% level of significance. (22 points)

Let

€

µu = mean math-ability score for those who are musically gifted

Let

€

µn = mean math-ability score for those who are not musically gifted

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

a .4y4

hope this !

answerim :

n

step-by-step explanation:

im not sure but my dad knows

hard

step-by-step explanation: