Which data set appears to have more variability between treatments than within treatments? Data Set A Data Set B The data that you collect suggest that the between-treatments variance is large, relative to the within-treatment variance, so the F-ratio for your study is likely to , suggesting be that
Which data set appears to have more variability between treatments than within treatments? Data Set A Data Set B The data that you collect suggest that the between-treatments variance is large, relative to the within-treatment variance, so the F-ratio for your study is likely to , suggesting be that
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
problem #4

Transcribed Image Text:Dr. Nicholas Guegen uses observational methods to study how certain kinds of environmental
stimuli influence human behavior. In one study, he manipulated the volume of music played in bars
to see how it would impact patrons' drinking behaviors. Trained observers recorded the number of
drinks ordered by several patrons in two establishments. The sound level was manipulated in both
establishments, and all observations occurred over three Saturday nights. Dr. Guegen used two
sound levels in his study: a normal sound level of 72 dB, which is similar to traffic noise on a busy
street, and a louder high-volume level of 88 dB, which is similar to noise from a lawn mower. You
decide to replicate this study.
The null hypothesis is that there is no difference between the mean number of drinks ordered
among patrons experiencing the high-volume noise level of 88 dB and the mean number of drinks
ordered among those experiencing the normal noise level of 72 dB. The alternative hypothesis is
that there is a difference between the mean number of drinks ordered among patrons experiencing
the louder noise level of 88 dB and the mean number of drinks ordered among those experiencing
the normal noise level of 72 dB.
Below are the graphs of two possible data sets. The horizontal axes display the number of drinks
ordered, while the vertical axes display the number of observed patrons who ordered that many
drinks. Use these graphs to answer the questions that follow.
High Volume (88 db)
1
be
that
2 3 4
Number of Drinks Ordered
Hormal (72 db)
5
I
3
2
Number of Drinks Ordered
Data Set A
5
O Data Set A
O Data Set B
6
#Patrons Observed
NW
High Volume (88 db)
1
4
Number of Drinks Ordered
Hormal (72 db)
ilh
2
3
4
Number of Drinks Ordered
Data Set B
Which data set appears to have more variability between treatments than within treatments?
5
The data that you collect suggest that the between-treatments variance is large, relative to the
within-treatment variance, so the F-ratio for your study is likely to
, suggesting
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