Let X1,X2X7 denote a random sample from a population having mean \mu and variance \sigma2.. Consider the following estimators of \mu:

\theta1=X1+X2++X7 / 7

\theta2= (2X1-X3+X5) / 2

a. Is either estimator unbiased?

b. Which estimator is best? In what sense is it best? Calculate the relative efficiency of the 2 estimtors

23

step-by-step explanation:

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2

the answer is c hope this

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x