2 Accuracy and Precision
In order to estimate the mean time that students spend traveling to school, a school
district administrator used five different sampling techniques to create samples from
the population of all students in the district. Each sampling technique was used to
create multiple samples, and then the administrator calculated the average for cach
sample. The graphs of the averages for each sampling technique are shown below
D
A district wide survey reveals that the mean commute time for all students is
20 minutes
(a) Which sampling techniques appear to most accurately estimate the mean
commute time for all students in the school district? Explain
(b) Which sampling techniques appear to overestimate the mean commute time for
all students in the school district? Explain
(c) Which sampling technique, B or E. is more precise when estimating the mean
commute time for all students in the school district? Explain