MATH 221 Week 7 Quiz: Statistics for Decision-Making (LATEST UPDATE) | 100% guaranteed pass
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Course
MATH 221
Institution
Devry University
MATH 221 Week 7 Quiz: Statistics for Decision-Making (May 2021) Question: (CO 6) The coefficient of determination is represented by what notation? Question: (CO 6) Two variables have a negative non- linear correlation. Does the independent variable increase or decrease as the dependent variable inc...
question co 6 the coefficient of determination is represented by what notation
question co 6 two variables have a negative non linear correlation does the independent variable increase or decr
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MATH 221 Week 7 Quiz: Statistics for Decision-Making
Question 1
pts
(CO 6) The coefficient of determination is represented by what notation?
Correct Answer
r 2
r
β
ρ
See text page 499
Question 2
pts
(CO 6) Two variables have a positive non-linear correlation. Does the independent
variable increase or decrease as the dependent variable increases?
Correct Answer
Cannot determine from information given
Independent variable decreases
Independent variable would remain the same
Independent variable increases
See text page 473
, MATH 221 Week 7 Quiz: Statistics for Decision-Making
UnansweredQuestion 3
pts
(CO 6) Find the regression equation for the following data set
x 245 287 198 189 176 266 210 255
y 50 32 55 78 44 41 51 60
Correct Answer
ŷ = -0.18x + 93.15
ŷ = 0.18x + 93.15
ŷ = -0.18x – 93.15
cannot be determined
See text pages 487-488
Question 4
pts
(CO 6) An instructor wants to determine if a longer lesson would improve student test
scores. Which variable would be the explanatory variable?
The quality of the lesson
Correct Answer
The length of the lesson
The number of students in the class
Student test scores
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