©common core performance assessment
animal weight and food
molly claims when one animal weighs more than another animal,
it always eats more than the other animal. she also claims that
when one animal weighs less than another, it always eats less. she
supports her claims with the information shown in the table.
animal
weight
food eaten
data
caribou3/5
ton
12 pounds a day
giraffe 7/8
aton
100 pounds a day
panda1/4
iton
301 pounds a week
siberian tiger1/3
ton
55 pounds a day
3. mp.1 make sense and persevere which animal eats
the most? explain.

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)?