We are 95% confident that the interval from $113.05 to $136.95 captures u = the true mean purchase total for all customers.
Is it plausible that the true mean purchase total for all customers may be $140?
Yes, this is a plausible value for the population mean because $140 is within the 95% confidence interval.
O No, this is not a plausible value for the population mean because $140 is within the 95% confidence interval.
O Yes, this is a plausible value for the population mean because $140 is only a little bit above the upper boundary of
the 95% confidence interval.
No, this is not a plausible value for the population mean because $140 is not within the 95% confidence interval.

a) 7x=7

step-by-step explanation:

roots are from trees

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.