Downloading To see how much of a difference time ofday made on the speed at which he could download files, acollege sophomore performed an experiment. He placed afile on a remote server and then proceeded to download itat three different time periods of the day. He downloadedthe file 48 times in all, 16 times at each Time of Day, andrecorded the Time in seconds that the download took.a) State the null and alternative hypotheses, being carefulto talk about download Time and Time of Day as wellas parameters.b) Perform an ANOVA on these data. What can youconclude?c) Check the assumptions and conditions for an ANOVA.Do you have any concerns about the experimentaldesign or the analysis?d) (Optional) Perform a multiple comparisons test todetermine which times of day differ in terms of meandownload time.
Downloading To see how much of a difference time of
day made on the speed at which he could download files, a
college sophomore performed an experiment. He placed a
file on a remote server and then proceeded to download it
at three different time periods of the day. He downloaded
the file 48 times in all, 16 times at each Time of Day, and
recorded the Time in seconds that the download took.
a) State the null and alternative hypotheses, being careful
to talk about download Time and Time of Day as well
as parameters.b) Perform an ANOVA on these data. What can you
conclude?
c) Check the assumptions and conditions for an ANOVA.
Do you have any concerns about the experimental
design or the analysis?
d) (Optional) Perform a multiple comparisons test to
determine which times of day differ in terms of mean
download time.
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