It is believed that the average amount of money spent per u. s. household per week on food is about $99, with standard deviation $8. a random sample of 100 households in a certain affluent community yields a mean weekly food budget of $100. we want to test the hypothesis that the mean weekly food budget for all households in this community is higher than the national average. state the null and alternative hypotheses for this test, the test statistic and determine if the results significant at the 5% level.

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

32.5 is the answer i got thats the answer