1. USING STANDARD FORM AND ALGEBRA, WE HAVE SO FAR DETERMINED THAT (x + 2)2 --$+). WITH
YOUR GROUP, SOLVE FOR X
-b+-V-4ca+b?
X=
2a
I
2. ONCE YOU HAVE SOLVED FOR X ABOVE, WE CAN USE THIS AS A FORMULA TO SOLVE FOR X IN THE EQUATION
x2 + 2x-1=0 BY PLUGGING IN THE APPROPRIATE VALUES FOR A, B, AND C.
A=
B=
C=
X=

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?