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21-09-2022
Advanced Placement (AP)

Answered

Dr. Suarez, a veterinarian, wants to estimate the average number of calories a chihuahua
typically eats in a day. She'll take a sample of n chihuahuas and create a 99% confidence interval
for the mean daily caloric intake. She wants the margin of error to be no more than 8 calories. A
pilot study suggests that the daily caloric intake of chihuahuas has a standard deviation of 30
calories.
Which of these is the smallest approximate sample size required to obtain the desired margin of
error?

Answer :

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