Assume that newborn girls have birth weights with a mean of 3055 grams and a standard deviation of 692 grams. A random sample of 100 newborn girls is obtained and they have a mean birth weight of 2869 grams. What is the probability of randomly selecting another 100 newborn girls and getting a mean birth weight that is 2869 grams or lower? Does it seem like a sample mean of 2869 grams is unusual?

-4

step-by-step explanation:

answer: 414,377,008

step-by-step explanation:

just multiply it

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.