(Requires probability.) In an SRSWR, a population unit can appear in the sample anywhere between 0 and n times. Let Qi = number of times unit i appears in the sample, and ˆt = N n N i=1 Qiyi. a Argue that the joint distribution of Q1,Q2, . . . ,QN is multinomial with n trials and p1 =p2= · · · =pN =1/N. b Using (a) and properties of the multinomial distribution, show that E[ˆt ]=t. c Using (a) and properties of the multinomial distribution, find V[ˆt ].

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form

your answer is -9

step-by-step explanation:

answer: what are the answer choices?

step-by-step explanation:

d 600 because 15*10*2=300

300+300=600

step-by-step explanation: