Stats question and explain!

a least squares regression line was calculated to relate the length (cm) of newborn boys to their weight in kg. the line is weight = -5.58 + 0.1686 length. a newborn was 48cm long and weighed 3 kg. according to the regression model, what was his residual? what does that say about him?

1) what was his residual?

2) what does that say about him? select the correct choice and fill in any answer boxes to complete your answer (round to three decimal places as needed)
a. the newborn weighs kg less than the weight predicted by the regression equation
b. the newborn weighs kg more than the weight predicted by the regression equation
c. the newborn weighs the same as the weight predicted by the regression equation

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?

Which best explains why this triangle is or is not a right triangle ?