14. Intuitively, what would happen to the interval estimate of the commuting time if we instead interviewed 1000 people? (No calculation necessary).
14. Intuitively, what would happen to the interval estimate of the commuting time if we instead interviewed 1000 people? (No calculation necessary).
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Suppose we want to estimate the average
commuting time for residents in Boston, MA.
We draw a random sample of 225 people
(from a population of 673,000 people) and
measured their self-reported commuting time.
We find that the mean commuting time in our
sample is 31 minutes, and the standard
deviation of the sample's commuting time is
15 minutes. If it's easier, you can assume that
commuting time is normally distributed.
14. Intuitively, what would happen to the
interval estimate of the commuting time if we
instead interviewed 1000 people? (No
calculation necessary).
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