G Let Y be a normal random variable with mean μ and variance σ2 . Assume that μ is known but σ2 is unknown. Show that ((Y-μ)/σ) 2 is a pivotal quantity. Use this pivotal quantity to derive a 1-α confidence interval for σ2 .

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

b

step-by-step explanation:

this is because the profit is decreasing and turning into debt