Answer:Answer:
the added person age is 26
Step-by-step explanation:
let the added person age is A
the six person mean is (23+19+12+21+13+A)/6=19
=> 88+A/6=19
=>A=(19×6)-88
there fore A=26
Answer:
98% confidence interval estimate of the proportion of Mississippi mortgages that are delinquent lie between ( 0.0529 , 0.1731 ) or 5.29% to 17.31%
Step-by-step explanation:
Given -
A random sample of 150 mortgages in the state of Mississippi was randomly selected. From this sample, 17 were found to be delinquent on their current payment.
Sample size n = 150
Let x be the no of people delinquent on their current payment
Proportion of sucess = = = 0.113
confidence interval = 99%
= .02
= = 2.326
98% confidence interval estimate of the proportion of Mississippi mortgages that are delinquent =
=
=
=
=
= ( 0.0529 , 0.1731 )
Let x be the first even integers. The next two even integers are x + 2 and x + 4. The equation that best represent the given above is,
x + (x + 2) + (x + 4) = 84
The value of x from the equation is 26. This is the least among the number. Thus, the answer is not among the choices and it is positive 26.
2x+y=400
A=xy area of farmland
y=400-2x
A=400x-2x^2
A'(x)= 400 -4x derivative of area with respect to x
0=400-4x find out where f ' equals 0
4x=400
x=100
A'(x)= 400 -4x
A''(x)= -4 check 2nd derivative. if negative then relative max at x=100
2x+y=400
y=200
dimensions 100x200
hope it helped
14500/(1-0.11*150/360)=15196.51