Mathematics, 27.02.2020 22:26, hfleysher
Investigators studied the relationship between screen time (measured in hours/week) and body- mass-index, BMI= wt/ht" (wt = weight in kg and ht = height in meters), in men age 25 - 45. They surveyed 6234 U. S. men in this age group, the scatter diagram for the data was homoscedastic and the BMI data was approximately normally distributed both unconditionally and in each vertical strip.
The investigators generated the following summary statistics:
X = 35 SDX = 12
Y = 27 SDy = 6 r = 0.8
where X = hours of screen-time per week, and Y = BMI.
(a) (2 pts) Find the regression equation for predicting BMI from hours of screen time.
(b) (2 pts) According to this regression, by how much does BMI increase on average for each additional hour of weekly screen time?
Answers: 1
Mathematics, 21.06.2019 19:10, Lewis5442
Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?
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Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.
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Investigators studied the relationship between screen time (measured in hours/week) and body- mass-i...
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