In: Statistics and Probability
How long does it take to commute from home to work? It depends on several factors including the route, traffic, and time of departure. These times tend to be fairly close to symmetrical and mound-shaped. The data listed below (in minutes) is for a random sample of eight trips. Construct a
95%
confidence interval for the population mean time of all such commutes.
26
39
34
44
20
36
31
39
A) What is the mean for this set of data?
B) Confidence Interval: (
nothing
,
nothing
)
(round all answers to two decimal places)
C) The mean commute for professor St. John is 45 minutes. Does she have the same commute as the population?
A.
She has the same commute because 45 is the same as the sample mean.
B.
She does not have the same commute because 45 is not the same as the sample mean.
C.
She does not have the same commute because 45 is not within the interval.
D.
She has the same commute because 45 is within the interval.