Advanced Placement (AP), 12.05.2021 20:50, bfgnnnbddf6830
Nicole and Elena wanted to know if listening to music at a louder volume negatively impacts test performance. To investigate, they recruited 30 volunteers and randomly assigned 10 volunteers to listen to music at 30 decibels, 10 volunteers to listen to music at 60 decibels, and 10 volunteers to listen to music at 90 decibels. While listening to the music, each student took a 10-question math test. Given is computer output from a least-squares regression analysis using = volume and = number correct.
Predictor Coef SE Coef T P
Constant 9.9000 0.7525 13.156 0.0000
Volume –0.0483 0.0116 –4.163 0.0003
S=1.55781 R-Sq=38.2% R-Sq(adj)=36.0%
What is the -value of this test?
(Do not round)
Interpret the
P
-value of this test.
Assuming the slope of the true regression line relating
y
= performance on the 10-question math test to
x
= volume of the music is
, there is a
probability of getting a sample slope of
by chance alone.
Answers: 3
Advanced Placement (AP), 24.06.2019 07:00, tangia
Gretta needs a $300,000 mortgage and is offered two choices. the monthly payments for the fixed rate and predicted payments for the arm are shown. adjustable rate mortgage year monthly payment 1-15 $1,610.46 adjustable rate mortgage year monthly payment 1-5 $1,520.06 6-15 $1,728.54 what is the difference between the total costs of the mortgages rounded to the nearest hundred? $8,700 $1,700 $15,800 $5,000
Answers: 1
Advanced Placement (AP), 24.06.2019 07:40, trevorhenyan51
Type the correct answer in each box. use = 3.14 and if necessary, round your answers to the nearest hundredth. the area of the largest cross section of a sphere and the circumference of the sphere are in the ratio 4: 1. cm. the area of the largest cross section is about the radius of the sphere is cm. the circumference of the sphere is about cm2. the volume of the sphere is about cm?
Answers: 1
Advanced Placement (AP), 25.06.2019 14:30, nellymbh4227
What drifted apart millions of years ago to create two different worlds
Answers: 1
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