Unformatted text preview: Math 1107
Spring 2007
PROBLEMS 127 ARE MULTIPLE CHOICE AND YOU NEED TO
BUBBLE IN THE ANSWERS ON YOUR TESTING SHEET. 1. You want to see if more severe crashes occur at the Ford 500 in Talledega since the track has been
resurfaced in the Spring 2006. What kind of study would you perform? a. Survey
’0 Observational Study VS
b . Experiment G 3i  CWKQU‘ 2. You want to test if Formula 409, Lysol, or Tylex cleans your shower better. You divide your shower
into multiple sections to facilitate this comparison. What kind of study is best to perform? a. Survey
b. Observational Study L450, 3 CUMM’uJ/S 0Y1 3 w 67W
C @ Experiment (kWiii, Surf, a,“ mm +th game. 0.111..an 0 Motel. 3. The makers of Frumpies, “the breakfast of rug rats." want to improve their marketing, so they consult
you. They ﬁrst want to know what percentage of children, ages 10 to 13, like their celeryﬂavored cereal.
What kind of study should be performed to estimate this percentage? 95““? W
. Observational Study
0"“ 0. Experiment 4. If you look at the following residual plot, what would you think about the fit of the equation to the points?
=  ' '
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Pick the best answer. ' " ' ' ’ a. The equation fits the data well.
.' All that is left is random variation.
iere is some other variable still yet to be used to explain y. 5. Interpret Rsquared for the following TI83 printout, where x = static weight
and y = weight in motion: a. 97% of the variation of weight in motion can be explained by static weight.
. ‘ _% of the variation of static weight can be explained by weight in motion. ' " f the variation of weiglyin motion can be explained by stadg weight.
f the variation of static weight can be explained by weight in motion. ...
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 Spring '08
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