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) / 2a. Is either estimator unbiased?b. Which estimator is best? In what sense is it best? Calculate the relative efficiency of the 2 estimtors.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

y=x+9

?

step-by-step explanation:

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies