The world health organization reports that the distribution of ages at time of death in the united states has a mean of 79.8 years and a standard deviation of 15.5 years, based on death certificates. the distribution of ages at time of death is obviously left‑skewed (, few people die young and most die old). researchers plan to take a random sample of 100 american death certificates. (a) what are the mean and standard deviation of the sampling distribution of the mean age at death, x¯ , for samples of 100 american death certificates? (enter your answer rounded to two decimal places.)

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

c

step-by-step explanation: